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Re^3: calculate average in sliding windows

by marfabe (Initiate)
on May 23, 2012 at 14:43 UTC ( #972048=note: print w/ replies, xml ) Need Help??


in reply to Re^2: calculate average in sliding windows
in thread calculate average in sliding windows

Thanks Eliya
Here's the simplified sample set

position value 1 1 10 3 30 1 40 2 60 2

And here the output for window size of 30

1-30 1.666666667 31-60 2


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Re^4: calculate average in sliding windows
by Eliya (Vicar) on May 23, 2012 at 15:05 UTC

    Ok, thanks.  So maybe like this?

    #!/usr/bin/perl -lw use strict; use constant WINDOW => 30; my $sum = 0; my $n = 0; my $p = WINDOW; while (<DATA>) { my ($pos, $val) = split; if (eof) { # corner case $sum += $val; $n++; } if ($pos > $p or eof) { print $sum / $n if $n > 0; $sum = 0; $n = 0; $p += WINDOW while $pos > $p; } $sum += $val; $n++; } __DATA__ 1 1 10 3 30 1 40 2 60 2

    Output:

    1.66666666666667 2

    (Upd: fixed handling of corner case)

      Yes!! It works perfectly! Thank you!

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