Hi,
If I understand you correctly, then I think all you need to do is
replace the two lines:
NhlRLSetFloat(srlist,NhlNsfYCStartV, 10);
NhlRLSetFloat(srlist,NhlNsfYCEndV, 24);
with:
float yvalues[5] = { 10., 15., 20., 22., 24. };
...
NhlRLSetFloatArray(rlist,NhlNsfYArray,yvalues,NhlNumber(yvalues));
When you use the sfYCStartV and sfYCEndV resources, the HLU library
has no way of knowing what the spacing is of your Y coordinate values.
By using the sfYArray resource instead, you can give it the explicit
values to use.
For more information on this, see the similar C example at:
http://ngwww.ucar.edu/ngdoc/ng/qsg/contour/cn03.html
(Click on "cn03c.c".)
--Mary
On Sat, 19 Mar 2005, p yg wrote:
> Good everyone,
>
> I have make a contourPlot with Irregular grid data, in Y axis are:
> 10
> 15
> 20
> 22
> 24
> in other word, in Y axis, the interval is 5 from 10 to 20, while the
> interval is 2 from 20 to 24.
>
> X axis are:
> 0 10 20 30 40
> As above, my data is not equal interval in Y axis, but I have gotten the
> equal interval contour graph. Why?
> How to get the right one?
>
> My code in HLU C:
> icount[0] = 5;
> icount[1] = 5;
> NhlRLSetMDFloatArray(srlist,NhlNsfDataArray,&data[0][0],2,icount);
> NhlRLSetFloat(srlist,NhlNsfXCStartV, 0);
> NhlRLSetFloat(srlist,NhlNsfXCEndV, 40);
>
> NhlRLSetFloat(srlist,NhlNsfYCStartV, 10);
> NhlRLSetFloat(srlist,NhlNsfYCEndV, 24);
>
> NhlCreate(&cndata,"cndata",NhlscalarFieldClass,appid,srlist);
> ...
> NhlRLSetInteger(srlist,NhlNcnScalarFieldData,cndata);
>
>
> For example, data[5][5] = { 10, 10, 10, 10, 10,
> 20, 20, 20, 20, 20,
> 30, 30, 30, 30, 30,
> 40, 40, 40, 40, 40,
> 50, 50, 50, 50, 50 }
>
> The above code get the graph with equal interval in Y axis as blow:
> 50 50 50 50 50
> .
> .
> .
> 40 40 40 40 40
> .
> .
> .
> 30 30 30 30 30
> .
> . .
> 20 20 20 20 20
> .
> .
> .
> 10 10 10 10 10
>
> but I want get the graph with non-equal interval graph as blow: The right
> graph is :
> 50 50 50 50 50
> .
> .
> 40 40 40 40 40
> .
> .
> 30 30 30 30 30
> .
> . .
> .
> .
> 20 20 20 20 20
> .
> .
> .
> .
> .
> 10 10 10 10 10
>
> How to write the code? Thanks.
>
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