If loop not acting properly??

Hello, just looking for some quick help. How come when I execute this code, the only value for which .003 shows up is the 101st iteration of i?

for i = 1:101
    if (i>=84)
        a = .003;
    elseif (i<84) && (i>=38)
        a = 0;
    elseif (i<38)
        a = -.0065;
    end
end
temp_si(i) = a

Answer 1

[Fangjun Jiang]

move the last line inside the for-loop.

[Jake]

Thank you!

[Fangjun Jiang]

And add temp_si=zeros(1,101) before the for-loop to pre-allocate memory.

[Jan]

So either:

temp_si = zeros(1, 101);
for i = 1:101
    if (i>=84)
        a = .003;
    elseif (i<84) && (i>=38)
        a = 0;
    elseif (i<38)
        a = -.0065;
    end
    temp_si(i) = a
end

or:

temp_si         = zeros(1, 101);
temp_si(1:37)   = -0.0065;
temp_si(84:101) = 0.003;

Of course I prefer the latter.