topic Re: proc transpose with LET in SAS Procedures

proc transpose with LET

a2veeram — Thu, 22 Jan 2015 20:36:53 GMT

Hello,

I have a dataset with repeating IDs and I want to keep them repeating under a certain condition.

So my table looks like this:

SAMPLEID	ResponseNumber	Item	Amount	Kcal.
1	1	A	55	100
1	1	B	66	200
1	1	C	77	300
1	2	A	55	150
1	2	B	66	250
1	2	C	77	350
1	2	D	88	450
2	1	A	33	60
2	1	B	44	70
2	1	C	55	80
2	2	A	22	50
2	2	B	33	100
2	2	C	44	150

And I would like it to be like this:

SAMPLEID	ResponseNumber	ItemA	itemB	ItemC	ItemD	Kcal
1	1	55	66	77	0	600
1	2	55	66	77	88	1200
2	1	33	44	55	0	210
2	2	22	33	44	0	300
etc...

I used

proc freq data=old;

tables SAMPLEID*Item out=new;

weight Amount / zeros;

run;

(I used proc freq so that if a respondent got the same Item a few times, I get a sum of its amount.)

proc transpose data=new prefix=item out=transposed;

by SAMPLEID;

id Amount;

var count;

run;

What i got was transposed table that summarized all amounts for each item and dropped KCAL.. I think it gets summarized at the point of proc freq... that's why using LET after proc transpose will not change anything i guess..

What should I add/change to have the IDs repeating if ResponseNumber changes from 1 to 2..? Is there any way to mark/rename all the repeating IDs ?.. E.g. If ResponseNumber = 1 then ID changes from 1 to 1-1 , from 2 to 2-2 and so on... and if ResponseNumber = 2, then 1-2, 2-2, 3-2 and so on..

Thank you very much!

Best,

Anastasia

Re: proc transpose with LET

Reeza — Thu, 22 Jan 2015 21:24:25 GMT

Add responseNumber into your BY Statement.

proc transpose data=new prefix=item out=transposed;

by SAMPLEID ResponseNumber;

id Amount;

var count;

run;

Since its not quite a 'straight' transpose you may want to transpose using a data step instead:

SAS Learning Module: Reshaping data long to wide using the data step

Re: proc transpose with LET

billfish — Fri, 23 Jan 2015 00:57:16 GMT

a solution:

proc transpose data=t_a prefix=item out=t_b1;
by SAMPLEID ResponseNumber;
id item;
var amount;
run;

data t_b2(keep= SAMPLEID ResponseNumber zSum rename=(zSum=Kcal));
set t_a;
by SAMPLEID ResponseNumber;
if first.ResponseNumber then zSum=0;
zSum+kcal;
if last.ResponseNumber then output;
run;

/** if you want the null values to become zeros', use coalesce() function **/

data t_want(drop=i _name_);
   merge t_b1(in=a) t_b2(in=b);
   by SAMPLEID ResponseNumber;
   ARRAY NN(*) _NUMERIC_;
   DO I = 1 TO DIM(NN);
      NN(I) = COALESCE(NN(I),0);
   END;
run;

Re: proc transpose with LET

Tom — Fri, 23 Jan 2015 02:05:25 GMT

Why not just do the SUM and the TRANSPOSE in two different steps and merge the results?

data have ;

input SAMPLEID ResponseNumber Item $ Amount Kcal;

cards;

1 1 A 55 100

1 1 B 66 200

1 1 C 77 300

1 2 A 55 150

1 2 B 66 250

1 2 C 77 350

1 2 D 88 450

2 1 A 33 60

2 1 B 44 70

2 1 C 55 80

2 2 A 22 50

2 2 B 33 100

2 2 C 44 150

;;;;

proc transpose data=have prefix=item out = t1 ;

by sampleid responsenumber ;

id item ;

var amount ;

run;

proc summary data=have ;

by sampleid responsenumber ;

var kcal ;

output out=t2 sum=kcal ;

run;

data want ;

merge t1 t2 ;

drop _name_ _freq_ _type_;

by sampleid responsenumber ;

run;

Re: proc transpose with LET

user24feb — Fri, 23 Jan 2015 06:53:36 GMT

Maybe a solution without transpose is worth a thought:

data have ;
input SAMPLEID ResponseNumber Item $ Amount Kcal;
cards;
1 1 A 55 100
1 1 B 66 200
1 1 C 77 300
1 2 A 55 150
1 2 B 66 250
1 2 C 77 350
1 2 D 88 450
2 1 A 33 60
2 1 B 44 70
2 1 C 55 80
2 2 A 22 50
2 2 B 33 100
2 2 C 44 150
;;;;

Data Want (Keep=Item: Total SAMPLEID ResponseNumber) ;
Array Arr[4] ItemA ItemB ItemC ItemD;
Do i=1 By 1 Until (Last.ResponseNumber);
Set have;
By SAMPLEID ResponseNumber;
Arr=Amount;
End;
Do j=1 To i;
Set Have;
By SAMPLEID ResponseNumber;
Total=Sum(Kcal,Total);
End;
Run;

Re: proc transpose with LET

a2veeram — Sat, 24 Jan 2015 19:55:57 GMT

Thanks everyone! Tom's code worked with a few modifications.. I had to use proc sort to make sure the program can read all the entries, proc summary (for items & amounts and another one for items & kcal), merge two summaries and then transpose!

Thanks a lot!

Re: proc transpose with LET

a2veeram — Mon, 26 Jan 2015 19:18:29 GMT

Tom, thank you very much!

Is there any way to mark/rename all the repeating IDs ?.. E.g. If ResponseNumber = 2 then ID changes from 1 to 1_2 and so on... ?

Thanks,

Anastasia

Re: proc transpose with LET

Tom — Mon, 26 Jan 2015 19:59:59 GMT

Do you mean just use both variables when generating the column name?

proc transpose data=have prefix=Response_ delim=_ out = t1 ;

by sampleid ;

id item responsenumber ;

var amount ;

run;

SAMPLEID	ResponseNumber	Item	Amount	Kcal.
1	1	A	55	100
1	1	B	66	200
1	1	C	77	300
1	2	A	55	150
1	2	B	66	250
1	2	C	77	350
1	2	D	88	450
2	1	A	33	60
2	1	B	44	70
2	1	C	55	80
2	2	A	22	50
2	2	B	33	100
2	2	C	44	150

SAMPLEID	ResponseNumber	Item	Amount	Kcal.
1	1	A	55	100
1	1	B	66	200
1	1	C	77	300
1	2	A	55	150
1	2	B	66	250
1	2	C	77	350
1	2	D	88	450
2	1	A	33	60
2	1	B	44	70
2	1	C	55	80
2	2	A	22	50
2	2	B	33	100
2	2	C	44	150

SAMPLEID	ResponseNumber	Item	Amount	Kcal.
1	1	A	55	100
1	1	B	66	200
1	1	C	77	300
1	2	A	55	150
1	2	B	66	250
1	2	C	77	350
1	2	D	88	450
2	1	A	33	60
2	1	B	44	70
2	1	C	55	80
2	2	A	22	50
2	2	B	33	100
2	2	C	44	150