Meaning of proc transpose is a powerful data manipulation tool in base sas. I need to transpose data from one row to one column. For a data set in wide format such as the one below, we can reshape it into long format using proc transpose. Within sas, basic tree traversal methods include nested and macro do loops. This paper presents an easy beforeandafter approach to learning proc transpose. Hi thomas, an often posed question and discussed subject on sasl. Using reshape2 for transposing datasets in r decision stats. Many programmers resort to use of the data step to. How to reshape data wide to long using proc transpose. How to keep multiple formats in one variable after transpose. Li, city of hope comprehensive cancer center, duarte, ca abstract you can store data with repeated measures for each subject, either with repeated measures in columns one observation per subject or with repeated measures in rows multiple observations per subject. I am not sure if transpose is the right concept here.
Find answers to counting the number of columns in a sas dataset after a proc transpose. I want to open the pdf in something and be able to automatically transpose it. How to keep multiple formats in one variable after transpose mindy wang abstract in clinical trials and many other research fields, proc transpose are used very often. Ctarget2 for the merge is to use the sort procedure to sort the data set by year and month as shown in the following program. The trans procedure introductory example consider the sas data set in figure 6. 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. Arthur tabachneck a better way to flip transpose a sas dataset.
Sometimes users are intimidated by the term array, but in sas, an array is simply a grouping of variables that lasts. I have a pdf i bought online and it is very clear but in the wrong key for alto. Overview to transpose your data turning variables into observations or turning observations into variables, you can use either proc transpose or array processing within a data step. Next, you can see that the column names are system generated and as a result are not. Some uses and handy abuses of proc transpose ralph w. To print the output data set from the proc transpose step, use proc print, proc report, or another sas reporting tool. How to reshape data wide to long using proc transpose sas learning modules. I recently came across a content in the net about the enhancements related to proc transpose in sas 9. Proc transpose is a powerful yet underutilized proc in the base sas toolset. If specified, the delimiter will be inserted between variable values if more than one variable has been specified on the id statement. First, lets see what happens when you use proc transpose on sashelp. Instead, for each by group, proc transpose creates one observation for each variable that it transposes.
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. The procedure pads the output data set with missing values if the number of observations in the input data set and the number of variables it transposes are. Besides these two, this paper also introduces a third way, proc. Structuring the data for a merge university of maryland. Preparing and reshaping data is the ever continuing task of a data analyst. The default tool in r would be reshape, although this is so user friendly that a reshape package has been added too. Using proc transpose to flip or restructure data by alan elliott. When i transpose this dataset it creates a dataset with 2. Thus, when the first character of the formatted value is numeric, the procedure prefixes an underscore to the value, truncating the last character of an 32character value. Quanticate outlines the indepth problems of transposing data using proc sql. Proc transpose is a powerful data manipulation tool in base sas.
When you use a numeric variable as an id variable, proc transpose changes the formatted id value into a valid sas name. These types of modifications can include changing a variables type from numeric to string or vice versa, merging the categories of a nominal or ordinal variable, dichotomizing a continuous variable at a cut point, or computing a new summary variable from existing variables. How to turn rows into columns in sas university edition sas. This tutorial explains the basic and intermediate applications of proc transpose with examples. This sas software tutorial shows how to use proc transpose to transpose a datasets rows and columns, and discusses when to use a transpose. Transposing multiple variables in a sas data set within a single macro call. Shoes dataset used in this article contains data on shoe sales and inventory, broken down by shoe products as well as the geographic variables. This is a slightly different situation than seen in table 4. Base sas, macros, routines, functions, sas data integration studio, sas in mainframes, sas webreport studio, sas enterprise guide, proc compare sas statistical analysis system search web.
Its a very powerful procedure when you need to change the shape of the data. The transpose procedure or how to turn it around sas support. Delimiter delimiter specifies a delimiter to use in constructing names for transposed variables in the output data set. Proc transpose for multiple values kanhaiya gupta, tcs, fond du lac, wisconsin abstract proc transpose can be used to rotate transpose sas data sets. Data step and proc transpose are the two most common methods. Simplifying effective data transformation via proc transpose arthur x. With sas, data transposition can be carried out in more than one way. It doesnt works as required for multiple values of. This is because by default sas will only transpose the numeric variables. Proc transpose variations, and their output results. Counting the number of columns in a sas dataset after a. It contains three sample sas input files, a set of basic.
Hi thomas, an often posed question and discussed subject on sas l. Creates an output data set by restructuring the values in a sas data set, transposing selected variables into observations. Table 5 is still a transpose of table 3, but it involves a transpose in two parts once to transpose var1 and once again for var2. When many variables with their individual formats are transposed into one variable, we lose the formats. Transpose procedure 1512 chapter 62 the trantab procedure 1525. Hello, i was wondering when doing a proc transpose, i want to keep one variable just as it was. 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. They can be used to simplify coding for repetitive calculations, to transpose data and to evaluate variables in a nonsequential manner. Transposing data using proc transpose search this guide search. Data transposition with proc report midwest sas users group. For example, you have data in vertical long format and you are asked to change it to horizontal wide format. Sep 21, 2014 r use r and sas to reshape the data format. Each lesson starts with a small input sas file followed by several proc transpose variations and their resulting output, and a few notes of explanation.
This procedure transforms the data from rows to columns or from columns to rows. In the example above, we would have one record for each student with a variable for each class and a. Proc transpose rearranges columns and rows of sas datasets, but its documentation and behavior. How to turn rows into columns in sas university edition 0. However, sas variable names cannot begin with a number. This sas software tutorial shows how to use proc transpose to transpose a datasets rows and columns, and. Simplifying effective data transformation via proc transpose. Simplifying effective data transformation via proc. 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. Taming the proc transpose matt taylor, carolina analytical consulting, llc abstract the proc transpose is often misunderstood and seldom used. I fail to solve it, i used proc transpose but i am not getting what i want. In sas, i have a data set similar to the one below. The original sas data set must be sorted or indexed prior to using a by statement with proc transpose unless you use the notsorted option.
Data transposition with proc report lingqun liu the university of michigan, ann arbor abstract transposition is a very common data manipulation task. The transpose procedure transposes selected variables into observations. How to reshape data wide to long using proc transpose sas. So lets transpose the data, and make the months become values, rather than variables. There is a summary sheet at the end of the paper as well for later reference. Many sas programmers have flipped out when confronted with having to flip transpose a sas dataset, especially if they had to transpose multiple variables, needed transposed variables to be in a specific order, had a mixture of character and numeric variables to transpose, or if they needed to retain a number of nontransposed variables. How to turn rows into columns in sas university edition. Transposing data using proc transpose sas tutorials. Looks and feels almost exactly like proc transpose doesnt have all of the capabilities of proc transpose as it was designed for just one purpose. A simple approach here is to transpose one group of variables at a time and then merge them back together. Most of the time, youll need to make modifications to your variables before you can analyze your data. 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. Because the copy statement copies variables directly to the output data set, the number of observations in the output data set is equal to the number of observations in the input data set. Jul 10, 2014 how to turn rows into columns in sas university edition 0.
This guide contains written and illustrated tutorials for the statistical software sas. Type is the by variable, and sold, notsold, repaired, and junked are the variables to transpose. Note problem statementthis is quite similar to using proc transpose using values in sas. May 12, 20 preparing and reshaping data is the ever continuing task of a data analyst. Nov 06, 2010 note problem statementthis is quite similar to using proc transpose using values in sas. Neither data set is currently structured correctly for the merge. Transposing multiple variables in a sas data set within a single macro call this macro is useful when data need to be restructured from a multiplerowpersubject structure into a onerowpersubject structure. Out puts the result of the transposition in the idlabel data set.
Hi all, first of all, thanks very much to all of you guys for actively showing interest in many of my queries and giving solutions. Shoes is the original input dataset specified using data and work. It contains three sample sas input files, a set of basic proc transpose variations, and their output results. The following is a a stepbystep tutorial on proc transpose basics, and b a quick reference sheet to which you can return for help later. The sas code to convert table 3 into table 5 beginning with proc transpose is definitely becoming more cumbersome.
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