Saving Data for for loop into a vector

I have a vector of 1801 THRUST data points. I am determining when the THRUST data is less than 0.43 and trying to index at what points this is the case. I am then trying to find the corresponding times. I have another vector, TIME, of the same length. Below is my code, but I cannot get it to print out the indexed times as a vector. Any help is appreciated

for i = 1:1801

if find(THRUST > 0.43)

Y(x) = TIME(i)

end

else Y = NaN

end

end

Answer 1

[Star Strider]

The loop is likely not necessary.

Try this:

idx = find(THRUST>=0.43, 1, 'first');
Time = TIME(idx);

to get the closest index, or:

idx = find(THRUST>=0.43, 1, 'first');
Time = interp1(THRUST(idx-2:idx), TIME(idx-2:idx), 0.43);

to interpolate to a more precise value, if ‘THRUST’ is never exactly 0.43.