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Posted 08-22-2018 11:13 PM
(1433 views)

Hi everyone,

I have a matrix created based on raw data. I want to use this matrix as input for cluster analysis. Can anyone help me to define that matrix as input? Here is the code I use. I tried that code but it did not work. I don't know what I'm missing. I also attached raw data I used.

Thanks

data tr;

infile 'C:\coll_gen\N100\GROUP10\COMP40\PHI25\gbt\RESULTS-SIG1.OUT';

input CAND_1$ CAND_2$ ID_1 ID_2 THETA_1 THETA_2 MATCHES RT_PROB FLAG ;

run;

proc iml;

use tr nobs nobs;

read all var{CAND_1 CAND_2 RT_PROB};

close;

levels=unique(CAND_1||CAND_2);

matrix1=j(ncol(levels),ncol(levels),.);

mattrib matrix1 r=((levels)) c=((levels)) label='' ;

row=(CAND_1);

col=(CAND_2);

do i=1 to nobs;

r=row[i];c=col[i];p=RT_PROB[i];

matrix1[r,c]=p;

end;

print matrix1;

quit;

ods graphics on;

proc cluster data=matrix1 method=ward ccc pseudo out=tree;

var RT_PROB;

id CAND_1;

run;

ods graphics off;

proc tree data=matrix1 out=New nclusters=5 noprint ;

height _rsq_;

copy RT_PROB ;

run;

1 ACCEPTED SOLUTION

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You can export row and column names at the same time as the matrix. For example:

```
create matrix1 from matrix1 [rowname=levels colname=levels];
append from matrix1 [rowname=levels ];
```

3 REPLIES 3

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All the matrices in IML are destroyed when you exit the procedure with 'quit'. In order to do what you want, you will need to add the IML statements:

```
create matrix1 from matrix1;
append from matrix1;
```

to export the contents of matrix1 to a SAS data set. There are other problems as matrix1 will be very sparse, mostly with missing values, and you will not be able to run a cluster analysis on it.

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Hi lanWakeling,

Thanks for your response,

I added the statements you mentioned. Now I have the matrix but it does not have the candidates id numbers in rows and columns. I attached the output.

Thanks

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You can export row and column names at the same time as the matrix. For example:

```
create matrix1 from matrix1 [rowname=levels colname=levels];
append from matrix1 [rowname=levels ];
```

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