Is there a simpler way to find the index of the first non NaN value in a vector?

temp = X;
temp(~isnan(temp)) = 1;
temp(isnan(temp)) = 0;
temp = find(temp);
first_non_NaN_index_of_X = temp(1);

Answer 1

[OCDER]

X= [NaN NaN 1 2 3 4 5]; 
first_non_NaN_index_of_X = find(~isnan(X), 1);

[Mr M.]

Thanks, and what about last non NaN? I have to use fliplr, or not necessary?

[OCDER]

No need as the find function has a last one search feature.

last_non_NaN_index_of_X = find(~isnan(X), 1, 'last')