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Re: how to use MIN_CURVE_SURF when CONTOUR [message #55873]

Tue, 18 September 2007 05:56

qunjie0111
Messages: 9
Registered: September 2007

Junior Member

Thanks Jean H.

smoothdata=MIN_CURVE_SURF(data,xvalues=lon,yvalues=lat,gs=[1 .0,1.0],bounds=[0,-90,359,90],/
sphere)

I changed them in this way,but the errors remain!

Thanks again for answering my question!

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Re: how to use MIN_CURVE_SURF when CONTOUR [message #55886 is a reply to message #55873]

Mon, 17 September 2007 08:48

Jean H.
Messages: 472
Registered: July 2006

Senior Member

qunjie0111@163.com wrote:
> hello!
> my data is data(144,73).
> longitude: lon = indgen(144)*2.5
> latitude: lat = indgen(73)*2.5-90.
> Before I CONTOUR it,I want to smooth the data ,using the function
> MIN_CURVE_SURF.MY code is:
>
> smoothdata=MIN_CURVE_SURF(data,xvalues=lon,yvalues =lat,gs= , $
> [1.0,1.0],bounds=[0,-90,359,90],/sphere,/TPS)

You have a problem here..
gs= , $
[1.0,1.0]

you have a useless comma... so basically, gs is nothing, and maybe it is
the source of your problem..
Jean

>
> But , after runing ,there are some errors :
>
> Attempt to subscript P3 with J is out of range.
> Error occurred at: MIN_CURVE_SURF 310 D:\RSI\IDL63\lib
> \min_curve_surf.pro
> ZONAL_MEAN_DATA 45 E:\DATA\ECMWF\zonal_mean_data.pro
> $MAIN$
> Execution halted at: ZONAL_MEAN_DATA 45 E:\DATA\ECMWF
> \zonal_mean_data.pro
> Program caused arithmetic error: Floating illegal operand
>
> I don't know how to correct them , please help me! thanks!
> zuoqunjie
>

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Re: how to use MIN_CURVE_SURF when CONTOUR [message #55948 is a reply to message #55873]

Tue, 25 September 2007 01:17

Tal
Messages: 26
Registered: August 2007

Junior Member

Hi Zuoqunjie,

I tried different combinations of this routine with your data.
no success.

however, this could be a bug at the min_curve_surf.pro in the lib
subdirectory of the IDL distribution (see line 310).

This looks to me as the source of the problem as far as i understand,
but does not make much sense. Maybe playing with xgrid, ygrid instead
of xvalues,yvalues will help.

When all else fails try also the ENVI support team
(support@ittvis.com).
I'll be happy to know what the answer was.

Good luck,
Tal

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Re: how to use MIN_CURVE_SURF when CONTOUR [message #56019 is a reply to message #55948]

Tue, 25 September 2007 18:44

qunjie0111
Messages: 9
Registered: September 2007

Junior Member

Thanks Tal

I tried it in your way:using xgrid, ygrid .

But the errors all the same!

Gloomy! I have no choice but to use the SMOOTH function.I hope the
IDL team can solve this problem as soon as possible!

Thanks Tal again for answering my question!

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