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The PROC TRANSPOSE technique in SAS (Statistical Analysis
System) is used to convert data from a "long" format to a
"wide" format or vice versa. It is especially handy when you need to
rearrange your data so that it may be used for different sorts of studies or
reporting. PROC TRANSPOSE is a strong SAS tool for reshaping data that is
extensively used in data analysis and reporting for a variety of data
manipulation activities.
PROC TRANSPOSE DATA=input_data OUT=output_data;
ID Subject; /* Unique values in 'Subject' become
new variable names */
VAR Score; /* Values in 'Score' are transposed */
BY Group; /* Optional: Transpose data within
each 'Group' */
RUN;
Basic Syntax of proc transpose
PROC TRANSPOSE DATA=input_data OUT=output_data;
BY variable(s);
ID variable(s);
VAR variable(s);
COPY variable(s);
PREFIX
prefix_string;
DELIMITER
delimiter_character;
RUN;
DATA=input_data: This specifies the input dataset to be
transposed.
OUT=output_data: The name of the output dataset where the
transposed data will be stored is specified.
Optional BY variable(s). Specifies one or more variables
that define data groupings. If your data is organised into groups, you may use
the BY statement to transpose data inside each group.
ID variable(s): Specifies the variable(s) whose unique
values will become the transposed dataset's new variable names.
VAR variable(s): Indicates which variables' values to be
transposed from rows to columns (or vice versa).
Variable(s) to COPY: Optional. Specifies which variables
should be transferred to the output dataset without being transposed.
PREFIX prefix string: This is optional. Provides a prefix to
be appended to the new variable names formed during the transposition.
Optional delimiter character for DELIMITER. Specifies the
character that will be used to separate the old variable name from the values
in the new variable names.
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