Create a data file suitable for charting or reporting. Proc transpose is a powerful yet underutilized proc in the base sas toolset. The syntax for the proc tranpose is somewhat misunderstood amongst sas users. Li, city of hope national medical center, duarte, ca abstract a common data managing task for sas programmers is transposing data. Obs centre subjectno gender visit sbp wt 1 1 1 female a 121. Taming the proc transpose matt taylor, carolina analytical consulting, llc abstract the proc transpose is often misunderstood and seldom used. Swap the data step for proc transpose sas proceedings and more. Taming the proc transpose sas proceedings and more. This paper presents an easy beforeandafter approach to learning proc transpose. Advanced report procedure tips and tricks updated for sas 9. Transpose proc means results sas support communities.
Further, the output data set can be used in subsequent data or proc steps for analysis. Renaming output data set variables since all variables in a sas data set must have names, sas makes an attempt to provide meaningful variable names in the output data set. Transposing data without proc transpose christopher j. Type is the by variable, and sold, notsold, repaired, and junked are the variables to transpose. Naming transposed variables when the id variable has duplicate values. Simplifying effective data transformation via proc. Is converted to sasfriendly variable name if necessary. An efficient and dynamic method is needed to reduce the lengths of these variables. Ods pdf output showing the results of using and not using the style merge option. For more information, see indatabase processing for proc transpose.
This tutorial explains the basic and intermediate applications of proc transpose with examples. Ods output in result viewer this is the table i actually want to use futher to merge with other variables, but sas file created in explorer along with this output, looks like this. The original variables all had comma sas formats note. One of the reasons for performing data transformation is that different statistical procedures require different data shapes. Out puts the result of the transposition in the idlabel data set. Transpose using array posted 07072014 737 views in reply to tom hi tom above code works fine except we need one addition, as you have created score variable, i think if statement should include score as score is also transposed, which results in extra observations. In sas, i have a data set similar to the one below. Sometimes you need to reshape your data which is in a long format shown below famid year faminc 1 96 40000 1 97 40500 1 98 4 2 96 45000 2 97 45400 2 98 45800 3 96 75000 3 97 76000 3 98 77000. The great thing about macros is you can use them to do the same tasks over and over again. Rotated1 created by proc transpose produces report 2. 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. For more information, see statements with the same function in multiple procedures. Transposition with by groups shows what happens when you transpose a data set with by groups. The simplest possible case of transposing switches the rows and columns of a matrix.
For example, consider the following 2x3 matrix 2 rows, 3 columns. Manipulating statistical and other procedure output to get the. Check out the use of across variables in proc report. The output data set contains the following variables. Sas programmers are often faced with the task of transposing data sets. Notice that the option prefix faminc specifies a prefix to use in constructing names for transposed variables in the output data set.
If the pvalue associated with the ttest is small usually set at p transpose mindy wang abstract in clinical trials and many other research fields, proc transpose are used very often. Formerly, i would have written 50 individual proc ttest statements, combed through the output, and then typed the correct values into the table shell. How to turn rows into columns in sas university edition. There is a summary sheet at the end of the paper as well for later reference. Use the ods output statement to create sas tables from the relevant ods output objects. In this section we will detail all of the features of the proc transpose. When many variables with their individual formats are transposed into one variable, we lose the formats. When you use a numeric variable as an id variable, proc transpose changes the formatted id value into a valid sas name. The proc transpose can save time and complexity once it is properly explained.
Also, if you are going to use the %let assignment statement to remove leading and trailing blanks there is no need for any macro functions, at least in ver 9 or greater. Proc transpose variations, and their output results. Transposing statistics from proc means sas support. 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 could plot 12 overlapping lines against year, but we really want them all together as 1 long timeseries line. 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.
The output data set can be used for analysis, reporting or further manipulation of the data. 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. Louis, missouri abstract proc transpose is a powerful yet underutilized proc in the base sas toolset. How can i generate pdf and html files for my sas output. The output from the procedure is a data set that contains the transposed data or reformatted data. For example, you have data in vertical long format and you are asked to change it to horizontal wide format. Youve now got the data in a sas data set, but each month is in a separate column or variable. Q1 q2 q3 q4 a 1 2 3 4 b 1 2 3 4 c 1 2 3 d 1 2 e 1 2 3 4 i have data like above and would like to import and reshape the data into what it looks like. When i transpose this dataset it creates a dataset with 2. Arthur tabachneck a better way to flip transpose a sas dataset.
Simplifying effective data transformation via proc transpose arthur x. Is converted to sas friendly variable name if necessary. Instead, for each by group, proc transpose creates one observation for each variable that it transposes. Theres probably a way to suppress the column that isnt used under cat1 in the output, but. You may need to transpose your data set in order to merge it with another data set, to feed into a sas stat procedure, or to simply create a betterlooking report. If applied to a traditional dataset, this would make it so that there was one row per variable, and one column per subject. Proc transpose vs arrays vs proc summary mike zdeb, university at albany school of public health, rensselaer, ny abstract when data for the same entity person, place, thing are stored across multiple observations, it is a common task to place all the data for a given entity into a single observation. Before the proc reg, we first sort the data by race and then open a. You can use the attrib, format, label, and where statements. Learn the basics of proc transpose douglas zirbel, wells fargo and co. How to reshape data long to wide using proc transpose. If specified, the delimiter will be inserted between variable values if more than one variable has been specified on the id statement. For a list, see dictionary of sas global statements in sas global statements. The transpose procedure can often eliminate the need to write a lengthy data step to achieve the same result.
Transposing data without proc transpose sas proceedings and. Using the output delivery system ods, you can create pdf, rich text files. Data transposition with proc report midwest sas users group. To print the output data set from the proc transpose step, use proc print, proc report, or another sas reporting tool. Report, which sas users can use to transpose data, in some circumstances, more efficiently than the other two methods. So lets transpose the data, and make the months become values, rather than variables. How to reshape data wide to long using proc transpose. Transposing this matrix would turn it into a 3x2 matrix 3 rows, 2.
Below is an example of using sas proc transpose to reshape the data from a long to a wide format. However, sas variable names cannot begin with a number. Usually, convert tall files into wide files example. Use proc print, proc report or some other sas reporting tool to print the output data set. If outputdataset does not exist, proc transpose creates it using the datan naming convention. Below, we run a regression model separately for each of the four race categories in our data. Assuming that youre familiar with your ods options to get it into excel im just lazily using html and saving it as. It doesnt works as required for multiple values of. Many programmers resort to use of the data step to achieve transposition which they believe results in better control. 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. The proc transpose is part of the sas language that does not get used as much. However, the names it chooses by default are probably not the ones you would prefer to assign.
You can write a data step to do this, but the useful transpose procedure can do the job in a fraction of the code. Hello, i was wondering when doing a proc transpose, i want to keep one variable just as it was. Use the transpose procedure to create the final output table. The transpose procedure can eliminate the need to write a complex data step that requires the use of one or more proc sort. This procedure transforms the data from rows to columns or from columns to rows. How to reshape data wide to long using proc transpose sas. The transpose procedure creates an output data set by restructuring the values in a sas data set, transposing selected variables into observations. A concrete example of the start data and the transpose used would help. Sas proc transpose and output to excel stack overflow. It calculates the tstatistic and its pvalue for the null hypothesis under the assumption that the sample comes from an approximately normal distribution.
Dynamically assigning length to transposed variables. In large scale data collections, this is problematic since this results in larger files than necessary. For reference here and use later, we store the names in character variable origvar. It is probably a little unorthodox when compared with other procedures that analysts use. It contains three sample sas input files, a set of basic proc transpose variations, and their output results. Shoes is the original input dataset specified using data and work. Bost, mdrc, new york, ny abstract this paper describes how to use one, two, and threedimensional arrays to transpose data in the data step. Sas users are unsure of the results it will give and curious about syntax that is often not particularly intuitive. After running my codes sas ods generate very nice output which looks like this. Id move to column name it allows you to include the values of a variable as variable names in the output data set. 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.
Example 2 on page 1280 out outputdataset names the output data set. Because of this, the number of records in your output data set will be the. The proc contents output shown in output 4 below indicates that each transposed variable has a length of 200. 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. 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. I was wondering if there was a pretty way to do this using proc sql because in the past it seemed that proc transpose was inflexible as problems became more complicated. 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. 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.
Using an array to transpose a table stack overflow. How to keep multiple formats in one variable after transpose. 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. Using proc sql in sas to transpose a table from long to wide. I came up with a solution below, but i cant help but wonder if proc sql could be used more efficiently. The transpose procedure always produces an output data set, regardless of whether you specify the out option in the proc transpose statement. Creates an output data set by restructuring the values in a sas data set, transposing selected variables into observations. Proc transpose transposes only the numeric variables, test1, test2, and final, because no var statement appears. You may need to transpose your data set in order to merge it with another data set, to feed into a sasstat procedure, or to simply create a betterlooking report. How to reshape data long to wide using proc transpose sas. Related groups of variables can be arranged in different dimensions of a multidimensional array to change the structure of a data set.
The transpose procedure 4 by statement 1273 default. For a data set in wide format such as the one below, we can reshape it into long format using proc transpose. 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. Open the pdf and html destinations to create the procedure output. Ods pdf output showing the results of using and not using the stylemerge option. First, lets see what happens when you use proc transpose on sashelp. It contains three sample sas input files, a set of basic. United states steel corporation rows of the original data matrix become columns, and columns become rows. Its a very powerful procedure when you need to change the shape of the data.
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