topic computing median by class in Statistical Procedures

computing median by class

Raja — Thu, 04 Aug 2011 16:16:04 GMT

Hi !

I have this following requirement:

I have a data file 'Score' with two columns.

The first column name is 'School' and second column name is 'marks'.

I have four schools named 'A', 'B', 'C', 'D'. School A has marks for 40 students, school B has that for 30 students, school C for 32 students and school D has that for 10 students.

So in total I have 112 rows in the data set

I want to write a SAS code which first computes the median marks for each school and then removes data for all students which is below the median score for that particular school.

Can you help me to code this?

Thanks

Raja

computing median by class

art297 — Thu, 04 Aug 2011 16:36:29 GMT

How about something like:

data have;

input school marks;

cards;

1 1

1 2

1 3

1 4

1 5

2 1

2 2

2 3

2 4

;

proc summary data=have nway;

var marks;

class school;

output out=medians (drop=_:) median=median;

run;

data want;

merge have medians;

by school;

if marks ge median;

run;

computing median by class

Raja — Thu, 04 Aug 2011 16:40:45 GMT

Thanks.. this will do for me...