topic Re: Array for putting Treatments into blocks in SAS Programming

Array for putting Treatments into blocks

Shomo_olongus — Wed, 26 Sep 2018 15:11:07 GMT

Please can some help me to write an array to select the first 4 trt (trt1 to trt4) into block 1, second 4 trt (trt5-trt8) to block 2, third 4trt (trt9-trt12) to block 3 and fourth 4trt (trt13 to trt16) to block 4?

%let N=100;
data generate;
call streaminit(0);
do i=1 to &N;
trt1 = rand("Normal");
trt2 = rand("Normal",1,2);
trt3 = rand("Normal",9,8);
trt4 = rand("Normal",3,5);
trt5 = rand("Normal",2,12);
trt6 = rand("Normal",1,6);
trt7 = rand("Normal");
trt8 = rand("Normal",3,3);
trt9 = rand("Normal",4,6);
trt10 = rand("Normal",2,3);
trt11 = rand("Normal",0,3);
trt12 = rand("Normal");
trt13 = rand("Normal",4,2);
trt14 = rand("Normal",3,1);
trt15 = rand("Normal",0,9);
trt16 = rand("Normal");s
output;
end;
run;

Re: Array for putting Treatments into blocks

ballardw — Wed, 26 Sep 2018 15:26:37 GMT

Can you show what you would expect the output data set to look like?

It might help to provide a few records of actual values, may be 5 to 10 rows, for your treatment variables and then what the data would look like after the assignment.

As it is, it is not clear whether you expect to have one block variable with 4 levels or 4 variables much less what the associated treatment variables would then look like.

Re: Array for putting Treatments into blocks

Shomo_olongus — Wed, 26 Sep 2018 16:43:15 GMT

Please I expect the data to look like this .

Block 1

Trt1 Trt2 Trt3 Trt4

1 1 1 1

2 2 2 2

3 3 3 3

. . . .

100 100 100 100

Block 2

Trt5 Trt6 Trt7 Trt8

1 1 1 1

2 2 2 2

3 3 3 3

. . . .

100 100 100 100

Block 3

Trt9 Trt10 Trt11 Trt12

1 1 1 1

2 2 2 2

3 3 3 3

. . . .

100 100 100 100

Block 4

Trt13 Trt14 Trt15 Trt16

1 1 1 1

2 2 2 2

3 3 3 3

. . . .

100 100 100 100