Is converted to sasfriendly variable name if necessary. For more information, see indatabase processing for proc transpose. This paper presents an easy beforeandafter approach to learning proc transpose. For example, consider the following 2x3 matrix 2 rows, 3 columns. When many variables with their individual formats are transposed into one variable, we. 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. Example 2 on page 1280 out outputdataset names the output data set. Data transposition with proc report midwest sas users group. Transpose data using proc transpose in sas column to row proc transpose syntax explained duration. The original variables all had comma sas formats note.
Several calls to proc transpose would be required to create this data set, which might take a considerable amount of processing time for a large data set. Proc transpose is a powerful yet underutilized proc in the base sas toolset. How to reshape data long to wide using proc transpose. Taming the proc transpose sas proceedings and more. For a data set in wide format such as the one below, we can reshape it into long format using proc transpose. Transpose using array posted 07072014 734 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. 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. Obs centre subjectno gender visit sbp wt 1 1 1 female a 121.
Related groups of variables can be arranged in different dimensions of a multidimensional array to change the structure of a data set. If you do not use the notsorted option in the by statement, then either the observations must be sorted by all the variables that you specify, or they must be indexed appropriately. For reference here and use later, we store the names in character variable origvar. 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. Transposing statistics from proc means posted 07102017 2390 views after running my codes sas ods generate very nice output which looks like this. 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. When i transpose this dataset it creates a dataset with 2. Hello, i was wondering when doing a proc transpose, i want to keep one variable just as it was. Proc transpose for multiple values kanhaiya gupta, tcs, fond du lac, wisconsin abstract proc transpose can be used to rotate transpose sas data sets. Now, the ods pdf destination enables you to produce high quality output. 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 am trying to take transpose of above sas file, to construct a sas file similar ods output table.
One last special escape sequence to note is wrapping to a marker. Learn the basics of proc transpose douglas zirbel, wells fargo and co. The simplest possible case of transposing switches the rows and columns of a matrix. Proc transpose contd proc transpose needs prior sorting but will create the necessary number of columns to accommodate all records being transposed proc transpose cannot transpose several variables into one row, instead they have to be transposed one by one 16. If the value of any id variable is missing, then proc transpose writes a warning message to the log. However, sas variable names cannot begin with a number.
For example, you have data in vertical long format and you are asked to change it to horizontal wide format. I fail to solve it, i used proc transpose but i am not getting what i want. How to keep multiple formats in one variable after transpose. Missing values appear for the variable measurement renamed from col1 when the variables being transposed have no value in the input data set for that by group. Instead, for each by group, proc transpose creates one observation for each variable that it transposes. If outputdataset does not exist, proc transpose creates it using the datan naming convention. Rotated1 created by proc transpose produces report 2. Its a very powerful procedure when you need to change the shape of the data. Results may be output as sas report, html, pdf, rtf, and textallowing for. 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. For more information, see statements with the same function in multiple procedures. A novel approach using hash objects continued any position within a new horizontal table formation. For a list, see dictionary of sas global statements in sas global statements.
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. This is something that proc transpose simply cant handle in a single step. 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. There is a summary sheet at the end of the paper as well for later reference. Where proc transpose will only include all numeric variables if there is no var statement, this parameter lets you indicate if you want all numeric variables, all character variables or simply all variables the % transpose macros features. You can find multiple examples in the sashelp library to help illustrate what a long dataset looks like. Usually, convert tall files into wide files example. Instead, we can write a data step transpose that can achieve the desired result in a single pass through the data. If you have ever had to rearrange a sas dataset, converting it from being a tall dataset to be in the.
Bost, mdrc, new york, ny abstract this paper describes how to use one, two, and threedimensional arrays to transpose data in the data step. Transposition with by groups shows what happens when you transpose a data set with by groups. United states steel corporation rows of the original data matrix become columns, and columns become rows. 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. Proc transpose transposes only the numeric variables, test1, test2, and final, because no var statement appears. 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. How to reshape data wide to long using proc transpose. Yellow highlights the start and end of the row specifications, which wrap around cell or column specifi.
Transposing this matrix would turn it into a 3x2 matrix 3 rows, 2. The transpose procedure 4 by statement 1273 default. Sas programmers are often faced with the task of transposing data sets. Below is an example of using sas proc transpose to reshape the data from a long to a wide format. Report, which sas users can use to transpose data, in some circumstances, more efficiently than the other two methods. It contains three sample sas input files, a set of basic proc transpose variations, and their output results.
You can write a data step to do this, but the useful transpose procedure can do the job in a fraction of the code. This procedure transforms the data from rows to columns or from columns to rows. Many programmers resort to use of the data step to achieve transposition which they believe results in better control. Shoes is the original input dataset specified using data and work. A concrete example of the start data and the transpose used would help. If applied to a traditional dataset, this would make it so that there was one row per variable, and one column per subject. You cannot use proc transpose with an id statement or a by statement with an engine that supports concurrent access if another user is updating the data set at the same time. You can use the attrib, format, label, and where statements. Type is the by variable, and sold, notsold, repaired, and junked are the variables to transpose. First, lets see what happens when you use proc transpose on sashelp. 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. The wrapper is a front macro to create the data set of replicates with a randomized dependent variable, and a back macro to process the results of the sas proc and. Proc transpose provides the ability to go from a long dataset where there are multiple rows for a given subject to a wide dataset where there are multiple columns for a subject.
For each by group in the original data set, proc transpose creates four observations, one for each variable it is transposing. Transposing data without proc transpose christopher j. This tutorial explains the basic and intermediate applications of proc transpose with examples. To print the output data set from the proc transpose step, use proc print, proc report, or another sas reporting tool. 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. When you use a numeric variable as an id variable, proc transpose changes the formatted id value into a valid sas name. Using an array to transpose a table stack overflow. Proc transpose oder doityourself 1 einleitung saswiki. The unique keys make sure the right data element goes to the right place in the new wide table. Create a data file suitable for charting or reporting. 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. 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.