The following program builds a data called auto, which we
will use for our examples.
DATA auto ; LENGTH make $ 20 ; INPUT make $ 1-17 price mpg rep78 modtype ; CARDS; AMC Concord 4099 22 3 2 AMC Pacer 4749 17 3 2 Audi 5000 9690 17 5 3 Audi Fox 6295 23 3 1 BMW 320i 9735 25 4 1 Buick Century 4816 20 3 2 Buick Electra 7827 15 4 2 Buick LeSabre 5788 18 3 2 Cad. Eldorado 14500 14 2 3 Olds Starfire 4195 24 1 2 Olds Toronado 10371 16 3 2 Plym. Volare 4060 18 2 2 Pont. Catalina 5798 18 4 2 Pont. Firebird 4934 18 1 1 Pont. Grand Prix 5222 19 3 2 Pont. Le Mans 4723 19 3 1 ; RUN;
Proc freq prints frequencies in
ascending order, as determined by variable value. For example, we request frequencies for
modtype
below and the table shows modeltype 1 followed by modtype
2 followed by modtype 3.
PROC FREQ DATA=auto; TABLES modtype; RUN;Cumulative Cumulative MODTYPE Frequency Percent Frequency Percent ----------------------------------------------------- 1 4 25.0 4 25.0 2 10 62.5 14 87.5 3 2 12.5 16 100.0
Suppose we create value format labels to add descriptive
text for the three models of cars using proc format, as illustrated below.
PROC FORMAT;
VALUE typefmt
1 = 'Sporty '
2 = 'Midsize'
3 = 'Luxury' ;
RUN;
Our tables will print as follows:
PROC FREQ DATA = auto; TABLES modtype; FORMAT modtype typefmt.; RUN;Cumulative Cumulative MODTYPE Frequency Percent Frequency Percent ----------------------------------------------------- Sporty 4 25.0 4 25.0 Midsize 10 62.5 14 87.5 Luxury 2 12.5 16 100.0
The table still prints in an order determined by the
actual variable value. Sporty cars are displayed first because the
variable is coded 1. We can, however, change the order the frequencies
are displayed by using the order = formatted option. This option
prints frequencies in alphabetical order as determined by the formatted value, as
illustrated below.
PROC FREQ DATA=auto ORDER=FORMATTED; TABLES modtype; FORMAT modtype typefmt.; RUN;Cumulative Cumulative MODTYPE Frequency Percent Frequency Percent ----------------------------------------------------- Luxury 2 12.5 2 12.5 Midsize 10 62.5 12 75.0 Sporty 4 25.0 16 100.0
You can use the order = freq option if you want to print values in
descending order of frequency.
PROC FREQ DATA= auto ORDER=FREQ; TABLES modtype; FORMAT modtype typefmt.; RUN;Cumulative Cumulative MODTYPE Frequency Percent Frequency Percent ----------------------------------------------------- Midsize 10 62.5 10 62.5 Sporty 4 25.0 14 87.5 Luxury 2 12.5 16 100.0