You can use PROC TRANSPOSE in SAS to quickly transpose a dataset from a long format to a wide format.
This function uses the following basic syntax:
proc transpose data=long_data out=wide_data; by var1; id var2; var var3; run;
- by: The variable to place along the rows
- id: The variable to place along the columns
- var: The variable whose values are placed within the dataset
The following example shows how to use PROC TRANSPOSE in practice.
Example: How to Use PROC TRANSPOSE in SAS
Suppose we have the following dataset in a long format in SAS:
/*create dataset in long format*/ data long_data; input team $ variable $ value; datalines; A Points 88 A Assists 12 A Rebounds 22 B Points 91 B Assists 17 B Rebounds 28 C Points 99 C Assists 24 C Rebounds 30 D Points 94 D Assists 28 D Rebounds 31 ; run; /*view dataset*/ proc print data=long_data;
We can use PROC TRANSPOSE to convert this dataset from a long format to a wide format:
/*create new dataset in wide format*/ proc transpose data=long_data out=wide_data; by team; id variable; var value; run; /*view wide data*/ proc print data=wide_data;
Notice that this dataset contains the same information as the previous dataset, but it’s simply displayed in a wide format.
By default, SAS creates a _NAME_ variable that shows which variable is used for the values in the dataset.
Feel free to use the DROP statement to drop this variable when using PROC TRANSPOSE:
/*create new dataset in wide format*/ proc transpose data=long_data out=wide_data(drop=_name_); by team; id variable; var value; run; /*view wide data*/ proc print data=wide_data;
Notice that the _NAME_ variable has been dropped from the dataset.
The following tutorials explain how to perform other common tasks in SAS:
How to Use Proc Summary in SAS
How to Use Proc Tabulate in SAS
How to Create Frequency Tables in SAS