>
> Hello,
>
> I am trying to compute a simple exponential function in a NCL routine
> but I could not find the function exp or anything similar on the
> "Built-in NCL functions and procedures"
> http://ngwww.ucar.edu/ngdoc/ng4.1/ref/ncl/NclFuncAndProcRef.html.
> Other math functions like sin, cos, log and log10 are there. Could exp
> have been forgotten?
I'm not sure why exp is not supported because it appears to be a standard
C math library function. I'll look in to it. In the meantime you can use the
following NCL source as a replacement:
function exp(x:double)
local e
begin
;
; Solve for constant e
;
e = 10.0^(1.0/log(10.0))
;
; compute e to the power of x for all elements of x
;
return(e^x)
end
Keep in mind that it is possible to configure NCL to call you're own C and
FORTRAN utilities. I can provide you more information on this if you wish.
For C it can be complicated but for FORTRAN we have a wrapper generating
utility called "wrappit77"
-ethan
>
> Thanks and Merry Christmas!
> Andrea
>
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>
>
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