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Re: Problem saving a simple png plot [message #94934 is a reply to message #94933]

Tue, 19 December 2017 02:36

Markus Schmassmann
Messages: 129
Registered: April 2016

Senior Member

On 12/19/2017 10:47 AM, Steve wrote:
> I am having an issue with saving a png file from a plot with Julian
> days on the x-axis (IDL 8.2). A very simple example is below
>
>
> p=PLOT([0,1],[0,1],XRANGE=[5,28],/NODATA,DIMENSIONS=[1400,40 0])
> p.SAVE,'test.png'
>
> The above works ok - xrange has small numbers
>
> p=PLOT([0,1],[0,1],XRANGE=[2457981.5,2458004.5],/NODATA,DIME NSIONS=[1400,400])
>
> p.SAVE,'test2.png'
>
> The above doesn't work where xrange now has example Julian days
> (larger numbers). The png file does not display the axes properly. I
> have tried playing around with the resolution keywords but this does
> not seem to help.
try one of these:

p3=PLOT([0,1],[0,1],XRANGE=[2457981.5,2458004.5],/NODATA, $
DIMENSIONS=[1400,400],xtickformat='(C(CMoA,x,CDI))', $
xtickvalues=[2457982.5:2458002.5:5])
p4=PLOT([0,1],[0,1],XRANGE=[2457981.5,2458004.5],/NODATA, $
DIMENSIONS=[1400,400],xtickformat='(i7)')

otherwise manually set the ticks using xtickvalues,xticknames,xminor

I don't see any problems with saving to png for IDL 8.6 with your code,
but getting rid of the exponents might help. Anyhow it makes your axis
more readable.

I hope this helps, Markus

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[Message index]

		Problem saving a simple png plot By: steven.abel on Tue, 19 December 2017 01:47
		Re: Problem saving a simple png plot By: Markus Schmassmann on Tue, 19 December 2017 02:36
		Re: Problem saving a simple png plot By: steven.abel on Tue, 19 December 2017 02:42
		Re: Problem saving a simple png plot By: Phillip Bitzer on Wed, 20 December 2017 15:41
		Re: Problem saving a simple png plot By: steven.abel on Thu, 04 January 2018 03:07

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