Detecting undefined list positions

There must be a better way:

Hey Steve,

One way to check for undefined values is checking that the absolute value of a value is greater than or equal to zero.

Hopefully this graph is helpful!

Thanks, Schuyler,

cool trick!

Your graph was quite helpful!

You also need to add infinity into your inequality… See here.

I think you can also just do L[L=L]

It doesn’t catch infinity.

Good to know! I never ran into that I guess.