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Re: How can make a simple movie from .txt files [message #77715 is a reply to message #77611]

Wed, 21 September 2011 13:24

Russell[1]
Messages: 101
Registered: August 2011

Senior Member

On Sep 16, 9:28 am, ece <ecekile...@gmail.com> wrote:
> Hi,
>
> I have 100 spectra in .txt files. Each file has wavelength and flux
> values. I want to make a movie showing each spectra as a function of
> time. Does anyone have a suggestion about how to start?

Hi Ece, I've done something like this for some galaxy spectra I had.
What I did was to use the MPEG tools (mpeg_open.pro, mpeg_put.pro,
mpeg_close.pro, and mpeg_save.pro) that come with IDL. So the
algorithm is pretty simple:

(1) read the first spectrum
(2) create a window with the pixmap option set
(3) plot the spectrum
(4) use tvrd() to get the data which you just plotted. this will be a
3xm x n array.
(5) use the mpeg_* utilities to put this into the file
(6) destroy the window
(7) goto (1) with a new spectrum

Now, you can add things along the way to deal with frame rate, colors,
etc. And there maybe a better way than the creating/destroying all
those windows, but this did work for me.

-Russell

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[Message index]

		How can make a simple movie from .txt files By: ece on Fri, 16 September 2011 06:28
		Re: How can make a simple movie from .txt files By: Matt Francis on Sun, 18 September 2011 15:37
		Re: How can make a simple movie from .txt files By: Russell[1] on Wed, 21 September 2011 13:24

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