in reply to Re^3: How do I make a histogram Question?
in thread How do I make a histogram Question?

Thanks for your help JadeNB. Hmm, I added that but I get a unhandled win32 exception. Here is the code that I have. 
use Math::GSL::Histogram qw/:all/;
use Math::GSL;

$file = "blah.txt";
$mode = 1;

$h = gsl_histogram_alloc(3);
gsl_histogram_set_ranges($h, [0, 41, 61, 100], 4);
gsl_histogram_increment ($h, 0);
gsl_histogram_increment ($h, 41);
gsl_histogram_increment ($h, 61);
gsl_histogram_increment ($h, 100);
$stream = Math::GSL::gsl_fopen $file, $mode;
gsl_histogram_fscanf($stream, $h);

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How am I doing this wrong?

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Re^5: How do I make a histogram Question?
by syphilis (Archbishop) on Jan 28, 2009 at 07:51 UTC
    I'm not really up to speed with this, but I think you might want something like: 
    use Math::GSL::Histogram qw/:all/;
use Math::GSL qw/:all/;

$file = "blah.txt";
$mode = 'w';

$h = gsl_histogram_alloc(3);
gsl_histogram_set_ranges($h, [0, 41, 61, 100], 4);
gsl_histogram_increment ($h, 0);
gsl_histogram_increment ($h, 41);
gsl_histogram_increment ($h, 61);
gsl_histogram_increment ($h, 100);
$stream = gsl_fopen $file, $mode;
gsl_histogram_fprintf($stream, $h, '%f', '%f');

    [download]
    At least that runs without error. On my Windows Vista box, I need to view 'blah.txt' in something like wordpad. For me, notepad ignores the newlines.

    It might be worth your while to download the Math::GSL source from CPAN, as the test files (in the 't' folder) provide useful examples of correct usage.

    Cheers,
    Rob
[reply]
[d/l]
      Thanks a lot syphillis! I really appreciate the help in getting me in the right direction!!
[reply]

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