MATLAB: Doesnt overwrite Variable inside of Loop

overwriting variable

I am trying to overwrite the variable "anzahl_gamma" when gamma on the position t is equal to "g_s", g_s is 0.05
so "anzahl_gamma" should be 4 after my loop but it doesnt overwrite.
gamma = [0.005,0.01,0.025,0.0500,0.1,0.9,0.95,0.975,0.99,0.995]; 
signifikanzniveau = 0.95; 
g_s = 1 - signifikanzniveau;   % 0.05
anzahl_gamma=0;
for t = 1:10
    if gamma(t)== g_s
    anzahl_gamma = t;
    end
end
Why does this give me anzahl_gamma=0;
and when i change g_s to 0.05 directly it works:
for t=1:10
    if gamma(t)==0.05
anzahl_gamma=t;
end
end
with 0.05 directly i get anzahl_gamma=4;
What am i missing here? why is the first one (gamma(t)==g_s) not working?

Best Answer

gamma = int32([0.005,0.01,0.025,0.0500,0.1,0.9,0.95,0.975,0.99,0.995] * 1000);
signifikanzniveau = 0.95; 
g_s = int32((1 - signifikanzniveau) * 1000);   % 0.05
anzahl_gamma = 0;
for t = 1:10
    if gamma(t) == g_s
    anzahl_gamma = t;
    end
end
There are a few ways to solve this. See here about floating point numbers. Also, beware gamma is a reserved function, I try to stay away from using those as variable names.
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