Error approximation as a function

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jacob Mitch
jacob Mitch on 6 Oct 2019
Edited: Walter Roberson on 6 Oct 2019
I have this error approximation
and I am trying to create two functions. One which loops over the values and the second which loops over input x values. So far I have
function b = erff(x,N);
xx=-x^2;
a=x; b=a; c=1;
while(abs(a)>N);
a=a*xx*(2*c-1)/(c*(2*c+1));
b=b+a; c=c+1;
end
b=b*2/sqrt(pi);
I'm not sure if my code is correct or how to only make it loop over n values and x values seperately.

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