Base SAS 9.1.3 Procedures Guide - Acsu Buffalo

212 Chapter 3. The UNIVARIATE Procedure
When you specify a different key cell with the KEYLEVEL= option, this cell appears
at the upper left corner.
The length of the KEYLEVEL= value cannot exceed 16 characters and you must
specify a formatted value.
The KEYLEVEL= option does not apply unless you specify a HISTOGRAM,
PROBPLOT, or QQPLOT statement.
FREQ Statement
FREQ variable ;
The FREQ statement specifies a numeric variable whose value represents the frequency
of the observation. If you use the FREQ statement, the procedure assumes
that each observation represents n observations, where n is the value of variable. If
the variable is not an integer, the SAS System truncates it. If the variable is less
than 1 or is missing, the procedure excludes that observation from the analysis. See
Example 3.6.
Note: The FREQ statement affects the degrees of freedom, but the WEIGHT statement
does not.
HISTOGRAM Statement
HISTOGRAM < variables >< / options >;
The HISTOGRAM statement creates histograms and optionally superimposes estimated
parametric and nonparametric probability density curves. You cannot use the
WEIGHT statement with the HISTOGRAM statement. You can use any number of
HISTOGRAM statements after a PROC UNIVARIATE statement. The components
of the HISTOGRAM statement are described as follows.
variables
are the variables for which histograms are to be created. If you specify a VAR statement,
the variables must also be listed in the VAR statement. Otherwise, the variables
can be any numeric variables in the input data set. If you do not specify variables in
a VAR statement or in the HISTOGRAM statement, then by default, a histogram is
created for each numeric variable in the DATA= data set. If you use a VAR statement
and do not specify any variables in the HISTOGRAM statement, then by default, a
histogram is created for each variable listed in the VAR statement.
For example, suppose a data set named Steel contains exactly two numeric variables
named Length and Width. The following statements create two histograms, one for
Length and one for Width:
proc univariate data=Steel;
histogram;
run;