topic Re: Compute max values in SAS Programming

Compute max values

noobs — Wed, 03 Jul 2013 13:21:30 GMT

Data structure:

Price	TheMonth	TheYear
10	1	2013
11	1	2013
15	1	2012
12	2	2013
13	2	2012

I am struggling to compute max value of Price variable for each combination of TheMonth and TheYear

Final Result Expected:

Price	TheMonth	TheYear
11	1	2013
15	1	2012
12	2	2013
13	2	2012

I believe I cannot use MAX() function directly as it is not possible to define the array.

Will DO statement resolve it? in conjunction with BY statement after data is sorted by TheYear and TheMonth; sort of hazy on how to hash out the logic

Appreciate the feedback.

Thankfully,

Dhanashree Gadkari

Re: Compute max values

Rick_SAS — Wed, 03 Jul 2013 13:31:25 GMT

The simplest way is to bypass the DATA step and use PROC MEANS:

proc means data=... max;

class TheMonth TheYear;

var Price;

run;

Re: Compute max values

Ksharp — Wed, 03 Jul 2013 13:58:21 GMT

Rick Wicklin

there is need a option:

proc means nway ;

or use BY instead of CLASS.

Ksharp

Re: Compute max values

esjackso — Wed, 03 Jul 2013 13:59:22 GMT

Another alternative would be to use group by in SQL:

Proc sql;

create table max as

select max(price) as Mprice, themonth, theyear

from yourdata

group by themonth, theyear

;

quit;

If you dont need a dataset you can leave the table statement off and the report will output.

Re: Compute max values

noobs — Wed, 03 Jul 2013 14:11:59 GMT

Although the output of your suggestion is what I am exactly looking for, I need to restore data structure of output statistics as shown in Final data structure above for further plotting bubble charts .

So do you suggest using OUTPUT statement in proc MEANS, to capture Price, TheYear, TheMonth?

Not sure how to delete unwanted columns like _TYPE_ _FREQ_ and keep only MAX stat in proc step

Re: Compute max values

Rick_SAS — Wed, 03 Jul 2013 14:13:57 GMT

The NWAY option only affects an output data set. For printed output, it doesn't matter:

proc means data=sashelp.cars max /* NWAY */;

class origin type;

var mpg_city;

run;

Re: Compute max values

noobs — Wed, 03 Jul 2013 14:23:10 GMT

That was it. You resolved it esjackso1 thanks a bunch.