Calculating value of function in point

Question

Ds31 2021-10-23

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1570228-calculating-value-of-function-in-point

评论： Matt J 2021-10-23

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

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Answer 1

Matt J 2021-10-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1570228-calculating-value-of-function-in-point#answer_814893

在 MATLAB Online 中打开

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