1 view (last 30 days)

Show older comments

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

Wan Ji
on 29 Aug 2021

Edited: Wan Ji
on 29 Aug 2021

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

Yongjian Feng
on 29 Aug 2021

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);

dpb
on 29 Aug 2021

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.

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!