3d line plot help

T = linspace(-7.5,17,120);
S = linspace(-4.5,28,120);
Y = Piecewise(T,S);

function Yn = Piecewise(X1,X2)

T = linspace(-7.5,17,120);
N = length(T);


for n = 1:N
    if X1(n) > 0
        Y1(n) = cos(X1(n));
    end
        if X1(n) <= 0
            Y1(n) = exp(X1(n));
        end
            if X2(n) > 0
                Y2(n) = sin(X2(n));
            end
                if X2(n) <= 0
                    Y2(n) = 3*X2(n);
                end
 Yn = Y1(n).*Y2(n)             
       
end             
end

need some help so im asked to create a 3d line plot for 2 arrays T and S and then Y which solves a piecewise function, although im getting an error that states "vectors must be the same length " ? is my issue that Y isnt being properly solved ?

Answer 1

[Rafael Hernandez-Walls]

Using this function:

function Y = Piecewise(X1,X2)
T = linspace(-7.5,17,120);
N = length(T);
for n = 1:N
    if X1(n) > 0
        Y1(n) = cos(X1(n));
    end
    if X1(n) <= 0
        Y1(n) = exp(X1(n));
    end
    if X2(n) > 0
        Y2(n) = sin(X2(n));
    end
    if X2(n) <= 0
        Y2(n) = 3*X2(n);
    end
    Y(n) = Y1(n).*Y2(n);             
       
end

[Robert Tapia]

sorry can you explain a bit the difference from mine and why it would fix the vector length when plotting