# Calculating value of function in point

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Ds31 on 23 Oct 2021
Commented: Matt J on 23 Oct 2021
I have to write Matlab function:function value = evaluate(f,x,y,n) that evaluates value of real function f on equidistant array of n points on segment [x,y]. Function has to return vector of dimension 2xn, such that in first row are points from equidistant array, and in second row is function value in those points.
Here is my try, but this code doesn't seem to work. I get errors when I run this code. Any help is appreciated.
f=@(x)2*x+2^x;
test = evaluate(f,0,6,7);
function value = evaluate(f,x,y,n)
a = linspace(x,y,n);
b = f(a(1:n));
matrix = [a:b];
end

Matt J on 23 Oct 2021
f=@(x)2*x+2.^x;
test = evaluate(f,0,6,7)
test = 2×7
0 1 2 3 4 5 6 1 4 8 14 24 42 76
function matrix = evaluate(f,x,y,n)
a = linspace(x,y,n);
b = f(a);
matrix = [a;b];
end
##### 2 CommentsShowHide 1 older comment
Matt J on 23 Oct 2021
3. The return argument needs to be "matrix" instead of "value"

R2018a

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