I posted a similar post on odforce, so I apologize if you are reading this twice.

I have a vex operator that's reading an i3d file, some of the values being returned are nan
values. I was wondering if there's a way to test for nan values and replace them
with something different

eg

if foo==nan then
foo=0

thanks
Luca

try:

if foo!=foo then
foo=0

edward
try:

if foo!=foo then
foo=0

Wow, does this really work? I was under the impression that once you have a NaN in your calculation, pretty much everything that got near it would break. Good to know!

Antoine Durr

edward
try:

if foo!=foo then
foo=0

Wow, does this really work? I was under the impression that once you have a NaN in your calculation, pretty much everything that got near it would break. Good to know!

According to IEEE spec on floating point, every comparison with a NAN is false.

I'm not 100% sure this filters down to expressions though (or Python for that matter).

I had a similar issue.
Try something like:

Just found this post:
vex isnan [forums.odforce.net]

You can check using this function for example,
https://www.sidefx.com/docs/houdini/vex/functions/isnan.html [www.sidefx.com]