I am using the PDL module to perform statistical analysis on some basic datasets that I have.

I am having trouble figuring out how to do a simple operation (I think). I want to extract the minimum value of each COLUMN of data in a 2-dimensional PDL structure.

Here is a code fragment that I tried but didn't work:

for(my $k=0; $k<$maxColumns; $k++) {
    print "Min: " . min($dataA->slice('$k,:')) . "\n\n";
    print "Max: " . max($dataB->slice('$k,:')) . "\n\n";    
}
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The variable "$k" can't be interpreted within the slice() method.

Is there a way to perform a set operation to just get the results I want without a FOR loop?

Any help is appreciated. Thanks.