Length of elements in array that are not NaN

I am trying to get the length of an array, and exclude NaN values. At the end of the column there are some NaNs. How can I ignore those?

I tried:

length(thisS(:,11))

But this includes the Nans

When I try:

length(thisS(~isnan((:,11)))

I get:

length(thisS(~isnan((:,11)))

↑

Error: Invalid use of operator.

Answer 1

[Matt J]

num_no_nans = sum(  ~isnan(thisS(:,11)) ) 

[Benjamin]

thanks!