M.file functioms with Command window

Good evening, cause I'm in South Korea now is evening.

I wanna ask about M-file functions with input values in command window.

I thought it goes well, but it still doesn't work.

function ST1_5_3(x,y)

r = sqrt(x.^2 + y.^2);

n = length(x);

theta = size(n);

fprintf(' x y r theta \n');

for i = 1:n

    if x(i) > 0 
        theta(i) = atan(y(i) / x(i));

    elseif x(i) < 0
    if y(i) > 0
    theta(i) = atan(y(i) / x(i)) + pi;
    elseif y(i) < 0
    theta(i) = atan(y(i) / x(i)) - pi;
    else
    theta(i) = pi;
    end

    elseif y(i) > 0
    theta(i) = pi / 2;
    elseif y(i) < 0
    theta(i) = -pi / 2;

    else
    theta(i) = 0;
    end
    end
    theta(i) = th(i) * 180 / pi;
end

 fprintf('%2d %2d %5.2f %5.2f\n', x(i), y(i), r(i), theta(i));
end

[Command Window] x = [2 2 0 -3 -2 -1 0 0 2]; y = [0 1 3 1 0 -2 0 -2 0 2]; ST1_5_3(x,y)

And the error message is 'Matrix dimensions must agree.

and error in ST1_5_3 r=sqrt(x.^2+y.^2); '

How can I solve it...?

[Steven Lord]

What size is the x vector that you're passing into ST1_5_3?

What size is the y vector that you're passing into ST1_5_3?

Since x.^2 and y.^2 are the same sizes as x and y respectively, can you add x.^2 and y.^2?

[Ho Lee]

Thanx for comment... I'm such an idiot... that I didn't recognize the difference of size x vector and y vector... I wish you have a wonderful day!

Answer 1

[Guillaume]

How can I solve it...?

Provide a x and y input that are the same size

[Ho Lee]

Thanx for your comment. I am such an idiot... that I didn't recognize the difference between the size of x vector and y vector.