From: ara.t.howard@...
Date: 2006-08-04T09:40:02+09:00
Subject: Re: How to tell when IO::popen is finished?

> I'm on windows :)  I don't need root.  Ohhh gives me goosebumps ;)
>
> The problem isn't that the file isn't created.  It's just that I don't know
> when it's finished being written.
>
> I want to incorporate this into an app but I don't want to go trying to grab
> the image if it doenst exist yet.
>
> I'm not quite sure how your using PNG in your code above.  Is this a
> constant of gnuplot?
>

??  it's set to the first command line parameter

   >>      harp:~ > cat a.rb
   >>      require 'rubygems'
   >>      require 'gnuplot'
   >>
   >>      PNG = ARGV.shift || 'test.png'

it can be anything you like.


you have one of two problems:

   - /test2.png is being interpreted as some sort of switch.  definitely try
     without the leading slash - that's a bizarre filename anyhow...

   - the gnuplot exe is not being found in your PATH.  search the archives -
     i've solved this one before.

regards.

-a
-- 
happiness is not something ready-made.  it comes from your own actions.
- h.h. the 14th dali lama