Bessel function of arbitrary order

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1

Hi,

I am trying to use spherical Bessel function (of arbitrary order) but haven’t find a demo on this. Is there a tutorial demo available?

Thank you.

2

have a look into:

here we are adding special functions from the third party library SLATEC,

best, Joachim

3

Joachim,

I tried to install ngs-special-functions with the current version of ngsolve
NGSolve-6.2.1902-139-gc4543a8
The installation went through but it gave me a bug when I import
ngsolve.special_functions
It says
undefined symbol: zbesj_

4

Hi Guosheng,

I experienced this issue once before but cannot reproduce it anymor. Try to configure/build it again sequentially (i.e. make without ‘-j’)

5

I got the following error:

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
F2C_LIBRARY
linked by target “special_functions” in directory …/ngsolve-src/ngs-special-functions/src

– Configuring incomplete, errors occurred!

Is it due to my outdated version of Ngsolve?

6

that works now! Thanks, Matthiash.

7

@sxmeng

Could you post the complete output? Which OS are you running on?

8

Thank you Matthiash. I have reinstalled netgen from source and it works now!

Best,
Shixu

9

There was indeed a bug in the CMake scripts, a missing dependency of the build steps. It caused the ‘undefined symbol’ error and is now fixed.