All i have to do is to identify the three kinds of variables mentioned in this blog post. You must use the var statement when you use the with statement. When and why would you use proc transpose in sas, and what. Sas creates a row for each column, and a column for each row, in the output data set. The id statement weve already determined that there is an up element to this transpose, and that vertvar is going up. The following examples will illustrate how to utilize proc transpose to. You need a way to tell sas that you have 4 products and the values are 14. You can find multiple examples in the sashelp library to help illustrate what a. See chapter 3, statements with the same function in. The approach here is to use proc transpose multiple times as needed. The following examples will illustrate how to utilize proc transpose to convert this long dataset where there are multiple rows per subsidiary into a wide dataset where the rows are uniquely defined by each subsidiary. Proc transpose free sas tutorials sascrunch training. To create a transposed variable, the procedure transposes the values of an observation in the input data set into values of a variable in the output data set. Due to the page limit, only partial sample codes are presented in this paper.
Transposing one group of variables for a data set in wide format such as the one below, we can reshape it into long format using proc transpose. Proc transpose will create a new data set with zero observations and five. Refer to the sas procedures guide for more information on proc transpose. Introduction the proc transpose is part of the sas language that does not get used as much as it should. Proc transpose rearranges columns and rows of sas datasets, but its.
How to reshape data wide to long using proc transpose. Overview sas puts out an exam content guide containing a list of 23 main objectives m01m23 that are tested on every exam, as well as 70 expanded objectives x01x70 that define the entire domain of what could be tested. Prompt invokes the prompting mode nowindows suppresses the report window data names the data set report names a stored report outrept creates a report definition out creates an output data set headline creates a line. In this example i create dummy id with the needed information then transpose using id statement to name new variables using the value of product. Getting your data in shape with proc transpose pharmasug. Proc transpose doesnt have all of the capabilities of proc transpose as it was designed for just one purpose. Transpose using idgroup in proc summary sas community wiki. Transposing data using proc transpose sas tutorials. This function if achieved in a data step can be much more cumbersome to code. It doesnt works as required for multiple values of. In sas, the transpose procedure can perform simple transposes, widetolong, and longtowide restructuring of datasets. Mar 30, 2021 welcome to sas programming documentation for sas 9. In this article, we explain how to list the column names of a sas data set. Naming transposed variables when the id variable has.
In the following example i will draw the movements on a dataset to. If you search online for how to transpose using proc sql you will be told. Im answering the a2a when and why would you use proc transpose in sas, and what makes it so useful as a procedure. Reshaping data from wide to long format the do loop sas blogs. Naming transposed variables when the id variable has duplicate values. This sas software tutorial shows how to use proc transpose to transpose a datasets rows and columns, and discusses. Please use chrome or firefox when uploading assignments in. By using proc transpose, i can locate an example that ive used successfully in the past and modify that example to convert my current data from wide to long format. Is converted to sas friendly variable name if necessary. Proc transpose in its simplest form transposes all numeric variables in the input data set that do not appear in. Proc transpose merely swaps the rows and columns in the data set. How to format a date within proc transpose stateme. To print the output data set from the proc transpose step, use proc print, proc report, or another sas reporting tool. The sas datastep also does this very efficiently, perhaps even better than proc transpose.
Counting number of ovservations with proc transpose. If you have control over inputting your raw data and know how you plan to analyze the data you will probably n. The report procedure is widely used in generating reports which include. Proc transpose in its simplest form transposes all numeric variables in the. How this is done and what variables are chosen to transform are determined by the options that are chosen when running the procedure. For a data set in wide format such as the one below, we can reshape it into long format using proc transpose. Supports the output delivery system see chapter 2, fundamental concepts for using base sas procedures reminder. Proc transpose is an intensively used tool in base sas. This paper presents an easy beforeandafter approach to learning proc transpose.
A quick introduction to the powerful report procedure. It does not produce any output but does report the minimum cost on the log. The compare procedure 4 proc compare statement 225 procedure syntax restriction. How to reshape data long to wide using proc transpose. I would like an array like how mentioned in my initial code which is how i need the data organized.
How to reshape data wide to long using proc transpose sas. Jun 23, 2017 as you can see, the patients info were listed in multiple rows prior to running the proc transpose procedure. For example, you have data in vertical long format and you are asked to change it to horizontal wide format. Yet its documentation and behavior are difficult to comprehend. Our example data represents a wide file that we want to make even wider. Now, lets take a look at the codes we used to achieve this. Efficient sas programming and memory usage not in book homework instructions for uploading via blackboard note.
Below is an example of using sas proc transpose to reshape the data from a long to a wide format. The multiple transposed data files then are merged back. Id move to column name it allows you to include the values of a variable as variable names in the output data set. If only one variable needs to be transposed, proc transpose can perform this task directly. The report procedure has powerful report writing capabilities not found in other sas procedures. Implementing pivot functions in sas our sample codesstart with an exampleusing simple proc sql statementand will wrap up with a more complex one using both proc sql and proc transpose together to summarize data by particular variables. In the first transpose of the above code, we are telling sas to store information of all the variables in a single variable and the respective values in the another variable.
The data we are beginning with looks like the results of a typical proc freq. As such, with proc transpose, we first have to use the procedure to transform the wide file into a longer file, and then use proc transpose, again, to transform the. Reshaping data from wide to long format sas blogs sas. This tutorial explains the basic and intermediate applications of proc transpose with examples.
Creates an output data set by restructuring the values in a sas data set, transposing selected variables into observations. Apr 06, 2021 this guide contains written and illustrated tutorials for the statistical software sas. We will see an example of simple proc transpose below, which converts long to wide in sas. In the introduction we mentioned already that proc transpose rotates a sas data set, which is to say that transpose turns variables into observations and observations into variables example 1. The transpose procedure can eliminate the need to write a complex data step that requires the use of one or more proc sort. Example 1 suppose you have obtained the data presented below from a multicenter study, where each patient is identified by the means of the two variables centre and subjectno. Proc transpose as sas documentation says, the transpose procedure can often eliminate the need to write a lengthy data step to achieve the same result. It is very helpful when needing to shift data from rows to columns or vice versa. Naming transposed variables when the id variable has duplicate values example 6. It contains three sample sas input files, a set of basic proc transpose variations, and their output results.
There is a summary sheet at the end of the paper as well for later reference. Proc transpose is a powerful yet underutilized proc in the base sas toolset. A transposed variable is a variable the procedure creates by transposing the values of an observation in the input data set into values of a variable in the output data set. This paper will provide a non technical approach to understanding the transpose procedure by showing the programmer how to visualize the expected output. In this case, the variable month specified in id statement is a numeric variable. Using proc transpose to flip or restructure data by alan elliott. How to reshape data long to wide using proc transpose sas. For a list, see dictionary of sas global statements in sas global statements. Another example to reshape to wide to long in sas is shown below. Lenguaje sas eprints complutense universidad complutense. Learn about the powerful and seldom used proc transpose procedure in sas to transpose the data from rows to columns and vice versa. This sas software tutorial shows how to create and assign your own variable formats value labels in sas using proc format. So, you need to use proc print, proc report, or some other sas reporting tool if you want to print the output data.
Examples sas code comparison with a similar sas macro download. For example, below we create the data set one which contains information on pulse, sex. From the first output of proc print, we see that the data now is in long format except that we dont have a numeric variable indicating year. We store them in a new table and save them as a macro variable. You can transpose rows into columns by using the across define type. Complete guide to proc transpose in sas sas example code. It includes a product, a decision code and a count of each combination. Use the var statement to select the numericcharacter variables you want to transpose. The subject is rich enough that an entire book is devoted to proc tabulate called proc tabulate by example, by lauren e. Join the growing community of sas experts who share knowledge and best practices. This procedure transforms the data from rows to columns or from columns to rows.
The data step sas tutorials libguides at kent state. Proc transpose to issue a warning message and stop. If you want to see your output looks like the data shown in the image below. With the by statement, you can define groups of data that must be transposed. Visualizing proc transpose sas proceedings and more. Run as an alternative to writing a lengthy data step, you can often use the transpose procedure to restructure the values in a sas data set. The transpose procedure restructures the data by changing the variables into observations. Proc trans solves this problem and produces a sas data set containing the number of units to ship between each supply point and demand point.
Sas wont transpose the variables that are mentioned in the by statement. Its a very powerful procedure when you need to change the shape of the data. How can i do that using the prefix statement as an array to separate the admit dates in the code below. First, lets see what happens when you use proc transpose on sashelp. Example 1 simple transpose we start with a simple example of the transpose procedure. Proc transpose statement in sas is explained below with which we have depicted an example to reshape table from long to wide in sas. With the code below we show how to transpose only the sales column. Problem is the list does not clearly number the objectives nor provide code examples. The transpose procedure can transpose variables and observations, or transpose variables and observations within by groups.
Our tutorials reference a dataset called sample in many examples. The proc transpose is part of the sas language that. These formats are useful if you have numerically coded categorical variables and want to attach meaningful labels to those values. Proc transpose for multiple values kanhaiya gupta, tcs, fond du lac, wisconsin abstract proc transpose can be used to rotate transpose sas data sets. You can use the label, attrib, format, and where statements. Welcome to sas programming documentation for sas 9. The sas code necessary to recreate each example presented below is available from this sas file. Abstract the presentation of data is an essential part of virtually every study and there are a number of tools within sas. Proc transpose or how to turn it around sas institute. Dec 16, 2020 proc transpose does not produce printed output. For each by group, proc transpose creates one observation for each variable that it transposes. With only a few modifications, the above example can be used to reshape two or more variables. First step, it is required to sort the variables id time before using them in by statement in proc transpose.
Example 5 requires both operations in order to accomplish the task with proc transpose. Managing processing using proc sql not in book example code related to storing macros chapter 10 not useful for sas studio work. If however two or more variables need to be transposed, you need to transpose each variable separately and then merge the transposed data sets, which can be time consuming. In this example, since all the variables are character, without a var statement. Implementing excel pivot functionality in sas software. This paper will show you how to turn sas file a into sas file b with proc transpose. I just need each admit date to format as a date and not as number. Proc tabulate is especially useful for qualitative variables or for breaking down quantitative variables for di erent class variables. The proc transpose statements by the last statement of the transpose procedure we will discuss is the by statement. Proc transpose variations, and their output results.
To create transposed variable, the procedure transposes the values of an observation in the input data set into values of a variable in the output data set. Jan 18, 2016 a sas is considered self documenting because during the compilation time it creates and stores all the information about the data set like the time and date of the data set creation later no. Its sas file a examples are simple, but represent realworld sas file structures. Selected options used on the procedure statement are. The ability to effectively transpose a data set is very important when working with different data structures and different data standards. However, if you use the let option in the proc transpose statement, then the procedure issues a warning message. Taming the proc transpose sas proceedings and more. Ideally, datasets are structured so that each row corresponds to one unique subject or object, and each column corresponds to a single variable. In this example, we can transpose the records by region with the addition of a by statement to our proc. Python pandas proc transpose equivalent stack overflow. This section discusses some applications of the transpose procedure relevant to time series data sets. After the procedure, all of the info from each patient were listed in one single row. Listing column names can be useful to create more dynamic sas programs. It contains three sample sas input files, a set of basic.
643 700 391 894 1751 1711 1624 223 83 443 595 110 1448 1688 168 67 820 1016 893 1783 842 309 985 244 411 536 238 1233 801 135 787 1258 364 1257 1125 1574 1111 1457