# Dplyr Rename Column Programmatically

What I am trying to do is: rename column from a dataframe with a variable. More information on this is available in Troubleshoot Issues With Reports. rename_at() needs variables which you pass to vars(), a helper function to select variables, and a function that will do the renaming, passed to funs(). filter() picks cases based on their values. The result of data joins can be either an sf or data. Method 1 : Add column in Management Studio using GUI and visual aid and create the table with necessary order of column. Enter the new name for the sheet and press the enter key on the keyboard when finished. However, with the select command, only that column gets selected, while rename selects all columns. It will be obviously included in future updates to the on-premises side as well, but there’s currently no public schedule for that. Renaming Column Names for Multiple Columns Together Renaming Column Names for Multiple Columns Together Changing the column names is a common and an important task for any data wrangling works. SQL Server SP_RENAME Stored Procedure to Rename Table and Column Names We can use SP_RENAME storage procedure to rename a table in MS SQL Server. You'll also learn to aggregate your data and add, remove, or change the variables. mutate() and transmute() to add new variables that are functions of existing variables. refers to what was handed over by the pipe, ie. The mere fact that dplyr package is very famous means, it's one of the most frequently used. The Relational data chapter in R for Data Science (Wickham and Grolemund 2016). Tidy data has variables in columns and observations in rows, and is described in more detail in the tidy data vignette. ’, a dummy argument. The first step is to create a reference in our project. My approch is not working. Discussion on usage of numeric and name indexing. Even after reading programming with dplyr several times, I still struggle when creating functions from time to time. dplyr-package dplyr: a grammar of data manipulation Description dplyr provides a exible grammar of data manipulation. However, unlike in dplyr verbs, columns in. Look at this example: ALTER TABLE tablename RENAME COLUMN oldcolumn TO newcolumn; Workarounds for older releases: Use a view with correct column names: rename t1 to t1_base; create view t1 >column list with new name> as select * from t1_base; Recreate the table with correct. select() and rename() to select variables based on their names. If I have a dataframe (dat) with two columns, and there are NA values in one column (col1) that I want to specifically replace into zeroes (or whatever other value) but only in rows with specific values in the second column (col2) I can use mutate, replace and which in the following way. Personally, to me the coolest thing about SSIS is the ability to generate packages programmatically. RepositoryItemComboBox does not have the DataSource property and cannot show multiple columns. I'm in the processing of bringing my dplyr-dependent scripts into Azure, but getting errors with the rename() and everything() functions. I am a Cheltenham traditionalist, so technically this last day should not even exist, the Gold Cup should already have been run, and I should not have to blog having arrived home late on a bumpy taxi ride. In this video I show you what is and how to use the mutate function provided by dplyr. It makes you want to give up the renaming, rather than continue with it. I had to add the na. The header is default to be the column/measure name. In SharePoint all the lists has these columns by default. Can I asked why you want it chained "like a pipe" absolutely ? As data. The intention of this article is to express that a managed application can interrelate with Excel as a COM server. For the tidy method, a tibble with columns terms which contains the columns being transformed. Is there a way to rename a table column with Alter Table & Alter Column? Click to expand I don't believe you can do this directly via DDL statements. In the Select a system dialog box, click the name of the model f14 to select it as the context for renaming the variable Mw. In this post, we’ll go one step further and programm a function where a quosure will be turned to a string. io Find an R package R language docs Run R in your browser R Notebooks. dplyr from memory to db and back: Moved the data to a database, perform dplyr steps there, and then copy the data back. It would be desirable that dplyr could have a function for it. The SUMIFS function in cell D11 adds numbers from column D based on criteria applied to column B and C. we can do something like it with "Purrr" package,but not sure how to. seed(123) a <- as. G:\CMTE\AP\16\FY20\_D\MINIRCP_01. P: 4 kashifabbasi786. In tidy data: rename(. This allowed to defined other properties on the title column. using the following SQL. As with many aspects of R programming there are many ways to process a dataset, some more efficient than others. dplyr::count(iris, Species, wt = Sepal. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Is it possible to loop through each table and dynamically rename them to remove the character. How to Rename the Files in Folder using VBA Macro VBA Macro to Rename the Excel Files in a Folder from a Column in SQL Server The term CRLF refers to Carriage. Thus you use unnest to create 3 columns from the components of those columns. This post is an introductory guide to the dplyr package in the statistical programming language R. width = 10,fig. This no longer happens. I have a dataframe (main_schools), with one column named "school", and a number of other columns. Before you begin, take a look at the columns in the warpbreaks dataset, along with their types. Virtual scrolling of large data sets is possible. The first argument to this function is the data frame (surveys), and the subsequent arguments are the columns to keep. numeric) to change our column formats to numeric. It's also possible to use R base functions, but they require more typing. If you don't agree with how R defines a column data type, you can easily convert the column to a different data type. tidyr makes it easy to “tidy” your data, storing it in a consistent form so that it’s easy to manipulate, visualise and model. body, td { font-family: sans-serif; background-color: white; font-size: 12px; margin: 8px; } tt, code, pre { font-family: 'DejaVu Sans Mono. This Library Carpentry lesson introduces people working in library- and information-related roles to working with data in OpenRefine. Subset the columns from cars that end in "p" and call it pvars, use ends_with(). rename multiple variables in r Edited for answer using base R only. This way the internal name will be "clean". If you were to use this query as your source, as far as the data flow is concerned, the column names in the "table" are Column_Alias_1, 2 and 3. mydata $meanx <-(mydata$ x 1 + mydata \$ x 2) / 2. Check your view – Steve B May 10 '12 at 15:26 The site and column was created just milliseconds before this code is executed, so I am confident that it hasn't been RENAMEDit might have been screwed up by the fact that I use a Norwegian site template, though. Adding new columns with dplyr Besides performing data manipulation on existing columns, there are situations where a user may need to create a new column for more advanced analysis. The SUMIFS function in cell D11 adds numbers from column D based on criteria applied to column B and C. how to rename table name for MS Access database programmatically in vb6. In this post you will learn how to subset a data frame using square brackets and dplyr way. Many thanks, but I mean to actually delete the column from the tbl itself (not extracting the data from the tbl without the column). It has been well documented however for the purposes of clarity, I'll review it here too. We would like to make R understand that the column name is not col_name but the string inside it "dist", and now we would like to use filter() for dist equal to 10. sample to local. This episode is all about performing data manipulation to derive raw insights from your data using the R programming language. txt to testfile. dplyr can work with data. A predicate function to be applied to the columns or a logical vector. Is it possible to programmatically duplicate a worksheet exactly as it has been created, say for example, like an employee data form, where the field labels are colored, say blue, while the data. For the sake of this example, let's add to our data set a fictitious Quantity column, representing the quantity sold for each order. Purpose Functions Rename columns rename(df, … - Selection from SQL Server 2017 Machine Learning Services with R [Book]. RenameColumns. R library(dplyr) # need to install with install. It has a predefined syntax in which we specify the columns and their respective data types. The rename() function of dplyr package can be used to change the column names of a data frame. Is the dplyr package up-to-date? I know these are newer functions, but a year old at this point. Q&A for cartographers, geographers and GIS professionals. login' column before removing all the columns that start with 'assignee' together. I was able to extract the data using jsonlite. dplyr: Your friend for working with data in R. The Types of Data a Column Can Carry. NET with complete and easy programming example. Instead, we can use a scoped verb to succinctly summarize all columns at once. Splitting a column to many columns / Text-to-Columns. I know that each of these strings are contained within a cell in another column (B; the text I seek is only part of a string in B, but the arrangement of the text is exactly the same). However, you can use sp_rename, though Microsoft recommends that you drop and recreate the table so that scripts and stored procedures are not broken. I have spent a great deal of my career developing and/or implementing automated transformation. Typically, the first step I take when renaming columns with r is. As part of distributing updates to applications, I have a need to rename a table and several fields. How to rename a column header in SAP Business Objects Analysis OLAP? Oct 15, 2013 at 10:36 AM | 443 Views While creating an Analysis Workbook (from BEx query), the changes made to the column header go away when we refresh it. In this example, we want to rename Sheet1. Finding a string of text in a column of text strings. This can be handy if you want to join two dataframes on a key, and it’s easier to just rename the column than specifying further. Furthermore, the rename list doesn't include all columns. Combine of all nested tables, so all columns are included. Summarise all. ## v ggplot2 2. # rename column in r dplyr rename (new_field_name = old_field_name) You were previously able to directly use column index references in this package. How to rename all variables using non-standard evaluation. Using dplyr select() to rename a column: We can use dplyr select to rename a dataframe column as well. You want to calculate percent of column in R as shown in this example, or as you would in a PivotTable: Here are two ways: (1) using Base R, (2) using dplyr library. io Find an R package R language docs Run R in your browser R Notebooks. Parameters: mapper: dict-like or function. ’, a dummy argument. If table is too large, this put lock on entire table and create temporary outage for that table to be used. In this event you could set the column properties and customize the look and behavior of the column. Simple cookbook for functions and idioms within the scope of the tidyverse. 2740 IN THE SENATE OF THE UNITED STATES June 24, 2019 Received July 9, 2019 Read the first time July 10, 2019 Read the second time and placed on the calendar AN ACT Making appropriations for the Departments of Labor, Health and Human Services, and Education, and related agencies for the fiscal year ending September 30, 2020, and for other. The dplyr package is very useful in managing data frames. We will be using mtcars data to depict, dropping of the variable. Then click into the “Field Name” column of the field whose name you wish to change. 笔记内容:要尽量利用它避免产生太多中间变量，一步到位。与ggplot2的dataframe输入紧密结合。推荐一本dplyr和ggplot2结合的实践书：data-visuli. [person] ALTER COLUMN [lastname] VARCHAR(35) NULL GO. The package dplyr offers some nifty and simple querying functions as shown in the next subsections. This statement in SQLite allows a user to rename a table or to add a new column to an existing table. rm = TRUE argument to ignore NA values. I was able to extract the data using jsonlite. DITA TC Meeting Minutes 2013 - cumulative Minutes of the OASIS DITA TC Tuesday, 8 January 2013 Recorded by N. If you have it on, turn it *off* if you can. We would like to make R understand that the column name is not col_name but the string inside it "dist", and now we would like to use filter() for dist equal to 10. It works perfectly well across vectors as well. io Find an R package R language docs Run R in your browser R Notebooks. Here I show an example of how to work with the new object model for the migration of field values (Lookup fields X Taxonomy fields). I Create measure profit, But I need name of the column that table will decide. Manipulating data frames using the dplyr syntax is covered in detail in the Data Manipulation in R with dplyr and Joining Data in R with dplyr courses, but you'll spend the next chapter and a half covering all the important points. {r}  # Part 2 6. Here is an example of selecting the columns whose data types are numeric including integer and double and applying str_replace function to change the name. How to rename columns in R - SHARP SIGHT - […] explain how to rename variables, but since then, new techniques have been developed. Order rows by values of a column (high to low). And not all the column names need to be changed. A colleague was wondering if it is possible at all to rename the Title column in a SharePoint list and I thought it is worth blogging about. Abstracts the translation of the SQL syntax. Nothing This returns the names and data types of all columns of the. Because nothing works like that in dplyr with straight up strings stored in values. Copy mtcars into cars again. I am working with datatables that return the column names as sales_. Solved: How to Rename a VBA Module If this is your first visit, be sure to check out the FAQ by clicking the link above. All dplyr verbs now recalculate immediately the grouping structure, and respect the levels of factors. Sorting is expensive, $$\mathcal{O}(N \log N)$$, but it only needs to be done once. It works perfectly well across vectors as well. % # rename columns to. For the tidy method, a tibble with columns terms which contains the columns being transformed. Use a variant that ends in _ for non-standard evaluation friendly code. dplyr is a part of the tidyverse, an ecosystem of packages designed with common APIs and a shared philosophy. Along the way, you'll explore a dataset containing information about counties in the United States. The actual names of the columns in the table are not important. A predicate function to be applied to the columns or a logical vector. ', a dummy argument. * (bug 8350) Fix watchlist viewing bug when using Postgres. As a summary: tl;dr data. Splitting a column to many columns / Text-to-Columns. Selectspeciﬁcelementsusinganindex Oftenyouonlywanttolookatsubsetsofadatasetatanygiven time. Before attempting the following questions, you should have read Chapter 13 of Peng's textbook to learn the dplyr functions. Data Transformation with dplyr : :. To rename a folder in SharePoint 2010, Navigate to the library where the folder exists. dplyr mutating many columns with the same "mutation" I have a table with many columns that come from a survey tool that gave non-numeric results for Likert scaled questions, so instead of a numeric 5, I get a string "Extremely useful" (ironically). In this blog post, I'll show you how to rename columns in R. Like all Google charts, column charts display tooltips when the user hovers over the data. 笔记内容:要尽量利用它避免产生太多中间变量，一步到位。与ggplot2的dataframe输入紧密结合。推荐一本dplyr和ggplot2结合的实践书：data-visuli. Rename the column name in R using Dplyr: Rename the column name using rename function in dplyr. dplyr also has mutate_at verb that can very useful to make changes at a specific column in a data frame. packages("dplyr") command you could have typed in the Console. The package dplyr offers some nifty and simple querying functions as shown in the next subsections. Create, Rename, Alter and Delete Table in C# ADO. The notion of lazily grouped data frames have disappeared. vars_predicate of filter_at(), and a height filter. Basically, these things will be very useful, when preparing for an end to end deployment. Replacement for "rename" in dplyr. In order to do this, it has to collapse entire columns into a single values. dplyr::rename(tb, y = year) tidyr::unite(data, col, , sep) Rename the columns of a data Unite several columns into one. The first column of the graph contains time series plots of all of the parameters in the data frame. Tidy data has variables in columns and observations in rows, and is described in more detail in the tidy data vignette. The last single table verb is summarize() and it works a bit differently. Description Usage Arguments Value Useful functions available in calculations of variables Grouped tibbles Scoped mutation and transmutation Tidy data See Also Examples. Basically, these things will be very useful, when preparing for an end to end deployment. using the following SQL. Let's say I want to filter the starwars data frame programmatically. In this recipe, we will introduce how to add a new column using dplyr. Drop by column names in Dplyr:. The example uses data from the paper Bottomly et al. Vectorized funs take vectors as input and return vectors of the same length as output (see back). table dtplyr is a dplyr interface to data. 30 1 0 4 4 ## 6 Valiant 18. To show only the necessary column, create it manually and add it to the RepositoryItemLookUpEdit. As is detailed in the experiment backing materials the task is processing 40,000 records through either of the following non-trivial pipelines (the first one for dplyr, and the second one for rquery):. y will be added to the non-joined duplicate variables to disambiguate them. How to rename suffixes when joining tables in dplyr Problem When joining two tables with dplyr , the suffixes. using dplyr functions programmatically. Dplyr package in R is provided with select() function which select the columns based on conditions. Here's a simple example that lets me filter based on homeworld and species: But this doesn't let me specify, say, a height filter, because I've hard-coded the %in% operator in the. Following our own advice to decide appropriate packages for the work early on (see Section 5. Use this data type wherever you would use a String value. Usng dplyr's grammar of data manipulation, I want to create metric1_diff, metric2_diff, metric3_diff. Pass a variable to dplyr "rename" to change columnname. Jun 8 Visualize Missing Values Detecting missing values is an important task during exploratory data analysis, and a data analyst may end up drawing an inaccurate inference about the data if the missing values are not handled properly. One can view this as R version for the pandas package from Python. dplyr provides ‘rename()’ function to, ah — , rename columns, so let’s insert a step before the second select step like below. 1 === * The installer now includes a check for a data corruption issue with certain versions of libxml2 2. dplyr::mutate_each(iris, funs(min_rank)) Apply window function to each column. A column chart is a vertical bar chart rendered in the browser using SVG or VML, whichever is appropriate for the user's browser. Return all column names as a list Usage ## S4 method for signature 'DataFrame' columns(x) ## S4 method for signature 'DataFrame' names(x) ## S4 replacement method for signature 'DataFrame' names(x) <- value ## S4 method for signature 'DataFrame' colnames(x) ## S4 replacement method for signature 'DataFrame' colnames(x) <- value colnames(x, do. When the Column Width window appears, select the new width value for the column and click on the OK button. A fast, consistent tool for working with data frame like objects, both in memory and out of memory. Adds new columns. rdar://problem/27688892 2016-08-08 Jeremy Jones Clear fullscreen mode state after exiting fullscreen mode to keep state in sync. A named character vector. The dplyr package…. In this tutorial, you will learn how to rename the columns of a data frame in R. To add a column, you enter data into the first blank cell beneath that column header. Find all flights that. This is a variable (or a set of variables) that uniquely identifies each observation (row). Although you can change the included data 1) through FetchXML you cannot programmatically alter the metadata that determines what and how it will render. More generally, you need dynamic arguments when you’re writing functions that do not just solve a problem for a specific data set or a specific column in a data set, but should work with several kinds of data sets or columns (see also the Don’t Repeat Yourself (DRY) Principle). will rename testfile. How to rename a database column? Database. In this recipe, we will introduce how to add a new column using dplyr. With dplyr we can… Select columns using dplyr::select() Rename columns using and dplyr::rename() Select distinct combinations of variables using dplyr::distinct() Arrange data from high to low using dplyr::arrange() and dplyr::top_n() Filter data using dplyr::filter(). dplyr has a complete parametric interface with the "underbar forms" (for example: using. You can find all my courses and videos at my site: https://mark. Virtual scrolling of large data sets is possible. R - Rename column of data frame or Change column names of a data frame by using R base functions, dplyr and plyr packages. dplyr:: transmute (iris, sepal = Sepal. Is there an additional argument specifying whether to append "log" at the end or at the start of the old column names?. Ask Question Rename column in grouped tibble by row value (dplyr) 2. analystguides 2,995. Library Carpentry: OpenRefine. Rename the column name in R using Dplyr. SSIS SQL Server Devalayalu Palukuru Telugu Stories Visiting Places. You can refresh the data now by clicking ‘Refresh Immediately’ button or schedule the hourly or daily refresh by setting the time and clicking ‘Save’ button. A column chart is a vertical bar chart rendered in the browser using SVG or VML, whichever is appropriate for the user's browser. Flew to Houston (IAH or HOU) Were operated by United, American, or Delta. Values are existing column names, names are new names. [person] ALTER COLUMN [lastname] VARCHAR(35) NULL GO. Select dataframe columns from a sequence of string name")) // rename if needed // select specific columns from dataframe using varargs syntax * val df_new = df. If you want to use the base version of these functions after loading dplyr, you’ll need to use their full names: stats::filter() and stats::lag(). In this problem, you will explore some useful dplyr functions. The reticulate package provides a comprehensive set of tools for interoperability between Python and R. frames as is, but if you're dealing with large data it's worthwhile to convert them to a tbl_df, to avoid printing a lot of data to the screen. 2016-08-09 Babak Shafiei Merge r204274. I am a Cheltenham traditionalist, so technically this last day should not even exist, the Gold Cup should already have been run, and I should not have to blog having arrived home late on a bumpy taxi ride. txt to tesa, so it seems to mean chop off everything after the last s and then append an a. In this example, we've selected a column width of 18. Use rename_all, and the toupper command (or colnames). Oumaima's Blog is about SharePoint development, configuration and administration. Keep in mind that the tidyverse package is a collection of packages that contains dplyr, ggplot2, and several other important data science packages. Replace/rename values in a vector. Select function in R is used to select variables (columns) in R using Dplyr package. tidyr::spread(pollution, size, amount). This function replaces character values with new character values, which is useful when performing rename operations when values are held in character vectors. What I am trying to do is: rename column from a dataframe with a variable. 22 1 0 3 1 ## 18 Fiat 128 32. dplyr and tidyr are going to be our main workhorses for data wrangling; The main structure these packages use is the data frame (or tibble, but we won’t go there) Two keys to getting started: learn about pipes %>% learn the dplyr verbs; dplyr functions are analogous to SQL counterparts, so learn dplyr and get SQL for free!. LastName etc. Choose or rename variables from a tbl. Blog post Hands-on dplyr tutorial for faster data manipulation in R by Data School, that includes a link to an R Markdown document and links to videos. How to rename suffixes when joining tables in dplyr Problem When joining two tables with dplyr , the suffixes. Dplyr package in R is provided with mutate(), mutate_all() and mutate_at() function which creates the new variable to the dataframe. then delete old tables and rename new tables to previos names. For me, dplyr's n() looked is a bit starge at first, but it's already growing on me. its own column & dplyr functions work with pipes and expect tidy data. Quick tip on how to use the DPLYR package in R to select and rename a column or feature name. 我想知道是否有一种方法可以按列的位置重命名列名，而不是按列名更改。 Below snippet shows how to change by name. Pass the required unbound column to this method. Now this column can be used as the value cell in reporting tables and charts and we’re all fine. dplyr Package. Exploratory Data Analysis: Case Study Processed votes Order rows by values of a column (high to low). slice_ Selects rows by position; ignores the grouping of the input ordered ore. packages("dplyr") command you could have typed in the Console. The following are the basic functions for manipulating data using dplyr. , the output of the last step. dplyr::arrange(mtcars, desc(mpg)) Order rows by values of a column (high to low). Go to Properties of the GridView-->Columns-->Add the column and set the DataBound to the DB Column name and Header Text Property. The pipe operator is shown here to provide a unified syntax that corresponds to the SQL query. Selectspeciﬁcelementsusinganindex Oftenyouonlywanttolookatsubsetsofadatasetatanygiven time. Sometimes, the requirements can be the site itself will be generated dynamically. Main verbs of dplyr and tidyr. Introduction. As with many aspects of R programming there are many ways to process a dataset, some more efficient than others. This was breaking with the Special:Rename operation which automatically logs the user in with the new password after changing it; pulling from slave meant the record was often not the updated one. A colleague was wondering if it is possible at all to rename the Title column in a SharePoint list and I thought it is worth blogging about. RELATED: How to Convert a Row to a Column in Excel the Easy Way. How to use the SE-versions of dplyr verbs. The ExistingName factor is the name of the column you want to rename. mutate() and transmute() to add new variables that are functions of existing variables. Where is says ‘Columns to rename’, move the column name from left to right using the buttons Where is says ‘Expression’ type in the new name. How do I do this programmatically? I did find sample code showing how to create a table in the MS KB using DAO (CreateTableDefs), but the Access 2002 VBA help provides no help on DAO, so I cannot find any modify/rename functions. How to rename a database column? Database. F2 > Rename > Tab (to next file) > Rename But in Ubuntu/Nautilus, I can't tab to next file. w w w w w w 1005 A 1013 A 1010 A 1010 A w w w w w w 1005 A 1013 A 1010 A 1010 A. The notion of lazily grouped data frames have disappeared. Is there a way to rename a table column with Alter Table & Alter Column? Click to expand I don't believe you can do this directly via DDL statements. I am using the following. and what i can do if i want to rename any simple column suppose i created list with two column 'name' and 'address', but now programmatically i want to rename 'address' as 'address1' please suggest any solution if you know !!. Conclusion. This no longer happens. the output of colnames(). Use named arguments to rename selected variables. Tidy data has variables in columns and observations in rows, and is described in more detail in the tidy data vignette. using the following SQL. You no longer need to use Design view to add or remove columns, although you can if you want. rename_if: Rename Multiple Columns based on Data Type. The tidyverse is an opinionated collection of R packages designed for data science. Example: Slice The rename manipulation renames the given column. `{r,warning=FALSE,message=FALSE,fig. Sometimes, the requirements can be the site itself will be generated dynamically. Blog post Hands-on dplyr tutorial for faster data manipulation in R by Data School, that includes a link to an R Markdown document and links to videos. R - Rename column of data frame or Change column names of a data frame by using R base functions, dplyr and plyr packages. dplyr::mutate(iris, sepal = Sepal. 1 ## v readr 1. The first argument to this function is the data frame (surveys), and the subsequent arguments are the columns to keep. Aggregation, filtering, sorting, and grouping of pivot data with drill-down capability. If you have it on, turn it *off* if you can. The item in the underlying database does not change, however, for presentation purposes you can change the name of the column or row heading of an Exploration View or list. If x had more columns, however, writing out each n_distinct() call would be a hassle. Following our own advice, we have selected a package for data processing early on (see Section 4. As with many aspects of R programming there are many ways to process a dataset, some more efficient than others. The above code will change the label of column at position 6. dplyr’s distinct is similar to the function unique, which we already saw, but it operates on data frames. RepositoryItemComboBox does not have the DataSource property and cannot show multiple columns. If I have a dataframe (dat) with two columns, and there are NA values in one column (col1) that I want to specifically replace into zeroes (or whatever other value) but only in rows with specific values in the second column (col2) I can use mutate, replace and which in the following way. In the first post, we had observed that dplyr verbs always returned a tibble. But the main difference is that, dplyr select() keeps only the variable you specify; dplyr rename() keeps all variables of dataframe intact.