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Re: peculiar things with Z-device [message #30985 is a reply to message #30983]

Fri, 31 May 2002 06:26

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

David Fanning wrote:
>
> Sverre Solberg (sso@nilu.no) writes:
>
>> I am plotting data points on maps using the map functions in idl and
>> using the Z-device. When the points are close to the plot boundary,
>> the program occasionally crashes and complains about too few valid
>> data points. It crashes when trying to call the 'oplot' procedure (for
>> each individual point). The peculiar thing is that this works
>> perfectly using other devices (as 'x', 'cgm'). And the even more
>> peculiar thing is that this depends on the value of oplot's keyword
>> 'symsize'. For example if I use symsize=0.4 it crashes, whereas
>> symsize = 0.38 or 0.42 works without problems...
>>
>> I must admit this belongs to the more weird things I have experienced
>> with idl.
>>
>> When I use the 'convert_coord' function, it doesnt seem though as the
>> problematic points are outside the plotting area (device coordinates
>> are larger than 0).
>>
>> Has anybody any similar experiences?
>
> I've seen weird things with the Z-buffer, too.
> One of the things I do as a rule is set !P.Charsize to 1
> when I enter the Z-buffer. This seems to make the buffer
> environment consistent with my display device. Since the problem
> you describe seems to have something to do with sizes,
> I would give this a try. Couldn't hurt. :-)

The OP might also consider using PLOTS rather than OPLOT for single point plotting (if I
understood his post correctly).

paulv

--
Paul van Delst Religious and cultural
CIMSS @ NOAA/NCEP/EMC purity is a fundamentalist
Ph: (301)763-8000 x7274 fantasy
Fax:(301)763-8545 V.S.Naipaul

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[Message index]

		Re: peculiar things with Z-device By: Liam E. Gumley on Fri, 31 May 2002 08:30
		Re: peculiar things with Z-device By: Paul Van Delst[1] on Fri, 31 May 2002 06:26
		Re: peculiar things with Z-device By: David Fanning on Fri, 31 May 2002 05:21

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