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Re: Creating colour-coded plots of spectra [message #67535 is a reply to message #67534]

Mon, 03 August 2009 00:35

jimmybobs
Messages: 9
Registered: January 2009

Junior Member

> Hi Jimmy,
>
> if you are happy with linear scale for the x and y axis,
> any of the numerous program to plot images with axes will
> do, but if it matters to you to have log scales as in the
> Ulysses plots, I suggest to use
>
> http://hea-www.cfa.harvard.edu/~pgrigis/idl_stuff/pg_plotima ge.pro
>
> Example of usage:
>
> pg_plotimage,dist(512,512),findgen(512),findgen(512)/10+1,/y log,/
> xstyle,/ystyle
>
> Ciao,
> Paolo

Hi,

Thanks for the advice! I will need to put log scales in, so that
sounds like it'll be very useful.

However (and this is my fault for not being clear) I'm not really at
that stage yet- I'm still trying to convert a line spectral plot into
a colour coded image, prior to plotting it. I basically have an array
with a range of values in representing an 8 second piece of data, then
a load of zeros, then another load of data, then zeros, etc... for an
hour or so. When plotting this prints out as many, many spectra all in
a line, and I'm trying to get idl to display them vertically and in
color (as in the Ulysses plots).

It may be that I need to write something to do this (I'm thinking
something that bins the data accoring to its value, then assigns it a
color based on intensity...) but as I've seen these plots around and
the seem fairly standard I was hoping someone might know of function
or program to do it for me- with my IDL skills it's likely to take a
fair bit of time/cursing!

Thanks,
Jimmy

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[Message index]

		Re: Creating colour-coded plots of spectra By: pgrigis on Mon, 03 August 2009 07:30
		Re: Creating colour-coded plots of spectra By: David Fanning on Mon, 03 August 2009 05:24
		Re: Creating colour-coded plots of spectra By: jimmybobs on Mon, 03 August 2009 00:35
		Re: Creating colour-coded plots of spectra By: pgrigis on Fri, 31 July 2009 07:38

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