opennl_LSCM

[xiaolong7]

Hello, I tried running the example of spectral LSCM, but got the following error. I am not sure where went wrong. Could you please provide me with some suggestions? Thank you!

"OpenNL error in nlOpenDLL(): Not implemented
Could not initialize ARPACK extension"

[BrunoLevy]

Hi,

To use spectral LSCM, you need to have ARPACK installed in your system.
Geogram comes with ARPACK bundled in the sources, and when you build it
it creates libgeogram_num_3rdparty that is loaded by OpenNL when you want
to solve an eigenvalue program (which spectral LSCM does).

If you just installed OpenNL PSM,
it does not come with a bundled ARPACK, so you have two options,
either install ARPACK, as follows if you are under Linux:

$ sudo apt-get install libarpack2

Or you can also install a full geogram, see instructions here)