Re: Undefined values returned by NclReturnValue

Hi Li,

Without looking at any code, my guess is that you are calling the function with the wrong type and/or the wrong dimension sizes.

First, make sure that if the Fortran routine is using REALs for the arrays, that you use floats inside the NCL script when calling this routine. If the Fortran routine is using DOUBLE PRECISION, then make sure you are using doubles in the NCL script.

Also, make sure your dimensions are in the correct order, although I don't think this is the issue here. Remember that if an array is NM x NS in the Fortran code, it will be NS x NM in the C wrapper.

Finally, make sure that the array you are returning is the exact same size as what the Fortran routine is expecting.

If you continue to have problems, please include the full script, Fortran code, and any needed data files. This is too hard to debug without seeing your code.

See:

http://www.ncl.ucar.edu/report_bug.shtml

Thanks,

--Mary

On Oct 29, 2013, at 7:41 PM, Li Dong <dongli@lasg.iap.ac.cn> wrote:

> Dear NCL team,
>
> After solve the linking problem for the EEMD codes, I tried to test it in NCL. I printed the result in the wrapper function before return, and it is correct. But when I printed it in NCL script, there are undefined values as:
>
> CORRECT ONE (printed in wrapper function):
> Mode 0:
> 0.000000
> 0.642792
> 0.984796
> 0.866018
> 0.342024
> -0.342024
> -0.866018
> -0.984796
> -0.642792
> 0.000000
>
> WRONG ONE (printed in NCL script):
> (0) -9.671524e+09
> (1) 4.574539e-41
> (2) -9.671574e+09
> (3) 4.574539e-41
> (4) -9.671623e+09
> (5) 4.574539e-41
> (6) -9.671672e+09
> (7) 4.574539e-41
> (8) 0
> (9) 0.6427915
>
> The return part of my wrapper function is:
>
> ng_size_t dimsizes_imf[2] = { nm, ns };
>
> return NclReturnValue(
> (void*)imf,
> 2,
> dimsizes_imf,
> NULL,
> NCL_float,
> 0
> );
>
> In this case, nm = 4, ns = 10, and imf is “float **". Where is wrong? Thank you in advance!
>
> Best regards,
>
> Li
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Received on Wed Oct 30 08:48:15 2013