topic Re: A question about proc gplot in Graphics Programming

A question about proc gplot

lueryy2000 — Wed, 13 Oct 2010 19:47:00 GMT

Hi,

Please see the below for my data:
data temp;
input ID $ score section;
datalines;
1 90 1
1 89 1
1 92 1
1 70 2
1 65 2
1 80 2
1 88 3
1 70 3
1 75 3
2 95 1
2 88 1
2 93 1
2 87 2
2 83 2
2 70 2
***more data;
;
run;

I want to get the plot of score by section for each ID, that is,one page for each ID, and draw a line to label the mean. I have many many IDs so I used a macro to do it. Here is my code:

%macro test(id);

data temp2;
set temp;
if ID="&id";
run;

PROC MEANS DATA=temp2 NOPRINT N MEAN STD;
VAR score;
CLASS section;
OUTPUT OUT=summary N=TOT MEAN=mean_score STD=std_score;
RUN;

data summary2;
set summary;
if section='' then delete;
run;

proc sort data=summary2;
by section;
run;

DATA _NULL_;
SET summary2;
CALL SYMPUT('a'!!TRIM(LEFT(_N_)),mean_score);
RUN;

DATA anno_data;
%SYSTEM(2,2);
%ANNOMAC;
%LINE(0.7,&a1,1.3,&a1,BLACK,1,4);
%LINE(1.7,&a2,2.3,&a2,BLACK,1,4);
%LINE(2.7,&a3,3.3,&a3,BLACK,1,4);
RUN;

AXIS1 ORDER=(0 TO 4 BY 1);
PROC GPLOT DATA=temp2 ANNO=anno_data;
PLOT score*section / haxis=axis1;
RUN;
QUIT;

%mend;

%test(1);
%test(2);

The first plot (ID=1) is correct. For ID=2, the data doesn't have section 3, but sas still draw a line at y=77.6, I guess this is the mean for a3 when ID=1, so it seemed it passed the value of last run. I don't understand how this happen. Thanks in advance.

Lu

Re: A question about proc gplot

GraphGuy — Fri, 15 Oct 2010 14:04:46 GMT

I would recommend using just a simple 'by' statement, rather than going to the trouble of looping through all the id's and calling a macro each time.

I would do it something like this...

data temp;
input ID $ score section;
datalines;
1 90 1
1 89 1
1 92 1
1 70 2
1 65 2
1 80 2
1 88 3
1 70 3
1 75 3
2 95 1
2 88 1
2 93 1
2 87 2
2 83 2
2 70 2
;
run;

proc sql;
create table avg_anno as
select unique id, avg(score) as avg_score
from temp group by id;
quit; run;
data avg_anno; set avg_anno;
length function $8;
xsys='1'; ysys='2'; hsys='3';
function='move'; x=0; y=avg_score; output;
function='draw'; x=100; color='blue'; size=.1; output;
function='label'; position='a'; size=.;
text='avg = '||trim(left(put(avg_score,comma10.1))); output;
run;

goptions gunit=pct htitle=5 htext=3.5;

AXIS1 ORDER=(0 TO 4 BY 1) minor=none offset=(0,0);
axis2 order=(50 to 100 by 10) minor=none offset=(0,0);

symbol value=circle h=2 i=none color=red;

PROC GPLOT DATA=temp;
by id;
PLOT score*section / haxis=axis1 vaxis=axis2 anno=avg_anno;
RUN;

Re: A question about proc gplot

lueryy2000 — Fri, 15 Oct 2010 15:38:54 GMT

Thank you very much. Although it is not what I expected, it is still a good way to do. Thanks again.
Lu