So you want to translate a dataset 

X  H
1  3
3  1
3  4
2  8
1  1
3  1
etc...

[download]

into

X\H 1  2  3  4  5  6  7  8 etc...
1   1  0  1  0  0  0  0  0
2   0  0  0  0  0  0  0  1
3   2  0  0  1  0  0  0  0
etc...

[download]

? Just like an Excel pivot table?

In reply to Re: Memory issue with cancer data (analogy) by hdb
in thread Memory issue with cancer data (analogy) by ZWcarp

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