Why do my values not match data on plot?

When using the find(ismember()) it comes up with an empty value.

Can anyone explain why?/how it isn't working?

Thanks

[Phil Whitfield]

It was a rounding error, I had to add

zz=rouund(zz,4);

and then it worked fine

Answer 1

[the cyclist]

My best guess on why

find(ismember())

is not working is that the number you are looking for is not exactly represented in floating point. You could try ismembertol.

Can you upload a MAT file with the value of T in it, and tell us exactly which point you are looking for?