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Re: tv with axes routine [message #51608 is a reply to message #51606]

Mon, 04 December 2006 01:21

Paolo Grigis
Messages: 171
Registered: December 2003

Senior Member

The solution proposed are useful, but actually sometimes you want
a behaviour similar to contour even for *not-uniformely* spaced
data, such that you specify an image z and two axis vectors
x and y with the coordinates of each horizontal and vertical
channel. In solarsoft, the routine "spectro_plot" will do that
for you.

Example:

;create some data
nx=800
ny=600

;image
im=dist(nx,ny)

;log scaled axis
x=10.^(findgen(nx)/(nx-1)*2)
y=10.^(findgen(ny)/(ny-1)*2+1)

;pick color table
loadct,5

;linear color scale
spectro_plot,im,x,y,/xlog,/ylog,/xstyle,/ystyle,/no_ut

;logarithmic color scale
spectro_plot,im,x,y,/xlog,/ylog,/zlog,/xstyle,/ystyle,/no_ut

;linear axis & color
spectro_plot,im,x,y,/xstyle,/ystyle,/no_ut

Ciao,
Paolo

Brian Larsen wrote:
> Has anyone out there written a wrapper for tv that makes the output
> look like contour?
>
> By like contour I mean with axes, and in the center of the window,
> scalable zrange, log scales, ability to add a colorbar (using colorbar
> would work separately also so long as position works)
> Contour is great but it inherently smooths and takes forever, I don't
> want either.
>
> This would be a blocky version of
> IDL> contour, dist(100), /fill, nlevels=100
>
> but of course
> IDL> tvscl, dist(100)
> doesn't have any axes, is in the wrong place and all.
>
> This would be the equivalent then of imagesc() in matlab.
>
> Cheers,
>
> -Brian
>

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[Message index]

		Re: tv with axes routine By: Brian Larsen on Mon, 04 December 2006 07:40
		Re: tv with axes routine By: Paolo Grigis on Mon, 04 December 2006 01:21
		Re: tv with axes routine By: mmeron on Sat, 02 December 2006 18:54
		Re: tv with axes routine By: Brian Larsen on Sat, 02 December 2006 17:46
		Re: tv with axes routine By: mmeron on Sat, 02 December 2006 17:28
		Re: tv with axes routine By: Brian Larsen on Sat, 02 December 2006 16:03
		Re: tv with axes routine By: mmeron on Sat, 02 December 2006 15:53
		Re: tv with axes routine By: Brian Larsen on Sat, 02 December 2006 14:33
		Re: tv with axes routine By: Brian Larsen on Sat, 02 December 2006 14:30
		Re: tv with axes routine By: Brian Larsen on Sat, 02 December 2006 14:27
		Re: tv with axes routine By: David Fanning on Sat, 02 December 2006 14:08

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