Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
Oh wise monks!

I am trying to use Math::GSL::histogram to construct an histogram with logarithmic bins. What I want to do is to read the data from an array or a PDL piddle. However, Math::GSL seems to require a "stream", i.e. a file to read data from. I tried to save my data to a file in several formats but I could not manage to get Math::GSL to read it. I am obviously doing something wrong and I will appreciate any hint from you!

Here is my code, it terminates with segment fault:

my $fo = gsl_fopen('myfile', 'w'); # sets the output file my $fi = gsl_fopen( $input_stream ); # here is where I can't understan +d how it works my $h = gsl_histogram_alloc (5); gsl_histogram_fscanf($fi, $h); my $range = [ 1.0, 10.0, 100.0, 1000.0, 10000.0, 100000.0 ]; gsl_histogram_set_ranges($h, $range, 4); gsl_histogram_fprintf($fo, $h, "%g", "%g"); gsl_fclose($fi); gsl_fclose($fo);

Thanks in advance!

In reply to How does Math::GSL accept data? by hda

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others perusing the Monastery: (2)
As of 2024-06-15 00:21 GMT
Find Nodes?
    Voting Booth?

    No recent polls found

    erzuuli‥ 🛈The London Perl and Raku Workshop takes place on 26th Oct 2024. If your company depends on Perl, please consider sponsoring and/or attending.