| Re: logarithmic colorbar [message #87441 is a reply to message #87436] |
Mon, 03 February 2014 09:43   |
simona bellavista
Messages: 56
Registered: December 2009
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Dear David,
your answer are always resolutive.
I just want to point out to hypothetical future readers that in order to fit the color bar I changed the margins with with xmargin.
On Monday, 3 February 2014 16:54:43 UTC+1, David Fanning wrote:
> simona bellavista writes:
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>> I am trying to make a logarithmic colobar. I am not entirely sure this is correct.
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>> The variable a that I am plotting as a shade of color is actually a log10(a). In the colorbar I would like to have a logarithmic axis. I do the following:
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>> colors = bytscl(alog10(a))
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>> plot, x, y, /nodata
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>> for i = 0, n_elements(x) plots, x[i], y[i], color=colors[i], psym=4
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>> vtick = alog10(2e3*dindgen(5)+1e3)
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>> colorbar, range = [min(alog10(a)),max(alog10(a))], orientation=1, tickvalues=vtick, tickname=string(tickvalues,format='(I6)')
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>> and the ticks are created as usually equi-spaced and they are actually 7.
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>> And also the option orientation does have any effect and I can't get the bar on the side, but instead it is on the top inside my plot, how do I get it to stay on the side? I think the problem is that when plot is called it fills the whole window and no space is left.
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> This article might help:
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> http://www.idlcoyote.com/graphics_tips/logcb.html
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> Cheers,
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> David
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> --
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> David Fanning, Ph.D.
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> Fanning Software Consulting, Inc.
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> Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
>
> Sepore ma de ni thue. ("Perhaps thou speakest truth.")
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