**Previous message:**Adam Phillips: "Re: Specifying a map region longitude"**In reply to:**Jonathan Vigh: "log-base2 axis?"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]

Hi Jonathan,

I asked Dave Brown, one of our NCL developers, about this, and he

came back with a full script showing an example. I modified his

example to use gsn_xxxx functions and to create some dummy data.

This gist of this example is that it uses some tickmark resources to

allow you to change the labeling to a log base-2 axis. Please see the

attached script and PS file and let me know if this is not what you're

talking about.

--Mary

On Tue, 13 Sep 2005, Jonathan Vigh wrote:

*> Greetings,
*

*> Maybe this is easy -- is there a straightforward way to make an
*

*> xy-plot with a log base-2 axis? I want to make a plot that has linear
*

*> frequency on one y-axis and period (log base-2) on the other axis (with
*

*> ticks at 2, 4, 8, 16). So the two y-axes would look like:
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*>
*

*>
*

*> 0.25 2
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*>
*

*> 0.2
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*>
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*> 0.15
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*> 4
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*> 0.1
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*> 8
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*> 0.05
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*> 16
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*> 0 inf
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*> -------------------
*

*>
*

*> I'm guessing it will involve something like:
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*> http://www.ncl.ucar.edu/Applications/Scripts/xy_8.ncl
*

*> but I'm not sure how to set the axis to be log-base2.
*

*>
*

*> A figure showing what I'm trying to reproduce is attached.
*

*>
*

*> Thanks,
*

*> Jonathan Vigh
*

*>
*

*>
*

*>
*

*> --
*

*> ---------------------------------------------------------------------
*

*> Jonathan Vigh, Ph.D. Candidate work phone: 970.491.8633
*

*> Department of Atmospheric Science vigh@atmos.colostate.edu
*

*> Colorado State University http://euler.atmos.colostate.edu/~vigh/
*

*> ---------------------------------------------------------------------
*

*> ~
*

*> _______________________________________________
*

*> ncl-talk mailing list
*

*> ncl-talk@ucar.edu
*

*> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
*

*>
*

- APPLICATION/PostScript attachment: log2y.ps

- TEXT/PLAIN attachment: log2y.ncl

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