Why do I receive Not enough input arguments?

function [SA]=equTriPrismSurfArea(s,h)
 
    SA=((sqrt(3)/2)*(s^2))+(3*s*h);
    s = 1;
    h = 1;
    for i = 1:5
        s = s(i);
        h = h(i);
        SA = ((sqrt(3)/2) * s^2 + 3*s*h);
        fprintf ("\nTotal surface area of equilateral triangular prism is %f\n",SA)
    end
end

Answer 1

[Wan Ji]

I just give a minor correction to your code

function [SA]=equTriPrismSurfArea(s,h)
SA=((sqrt(3)/2)*(s^2))+(3*s*h);
end 

Save the code as a m-file with name 'equTriPrismSurfArea.m'

IF you do not want to use function equTriPrismSurfArea, then copy these lines to command

s_arr = 1:5;
h_arr = 1:5;
for i = 1:5
s = s_arr(i);
h = h_arr(i);
SA = ((sqrt(3)/2) * s^2 + 3*s*h);
fprintf ("\nTotal surface area of equilateral triangular prism is %f\n",SA)
end

You can also call the function to do the work if you want to use it

s_arr = 1:5;
h_arr = 1:5;
for i = 1:5
s = s_arr(i);
h = h_arr(i);
SA = equTriPrismSurfArea(s,h);
fprintf ("\nTotal surface area of equilateral triangular prism is %f\n",SA)
end

Answer 2

[Yongjian Feng]

Try this:

function [SA]=equTriPrismSurfArea(sIn,hIn)
 
    for i = 1:5
        s1 = sIn(i);
        h1 = hIn(i);
        SA = ((sqrt(3)/2) * s1^2 + 3*s1*h1);
        fprintf ("\nTotal surface area of equilateral triangular prism is %f\n",SA)
    end
    
end

Then

sIn = randi(10, 1, 5);
hIn = randi(10, 1, 5);
equTriPrismSurfArea(sIn, hIn);

Answer 3

[dpb]

The error about not enough input arguments will come from how you called the function -- which you didn't show us. Whatever that was, it won't have passed two arrays in as the function expects/requires.

BUT, your function is fatally flawed in several ways -- first the initial line undoubtedly needs the "dot" element-wise operators .* and .^ in place of the matrix operators * and ^.

It would appear that's all your function would need; the rest would simply sum those areas.

As you've written it, however, you overwrite the input variables s and h and so the remainder of the code is totally bogus.

function [SA]=equTriPrismSurfArea(s,h)
  SA=sqrt(3)/2*sum(s.^2 + 3.*s.*h);
end

If the function is designed for equilateral triangles as the comment says, then you don't need to pass the array of dimensions for each side -- and there would be only four surfaces, not five, anyways.

Then instead of the sum() you would just multiply the area of one side by 4.