How can I plot sin(x),sin​(2x),...,s​in(nx) for an input n all on the same graph? Matrix dimensions must agree error

I'm trying to plot sin(x) and sin(2x) and 3x and so on up to sin(nx) all on the same graph. My code right now is as follows.

x=[-2*pi:pi/64:2*pi];
i = input('Enter a positive whole number: \n');
z=[1:i];
y=sin(x.*z);

for z = [1:i]
    plot(x,y);
end

It's giving me an error saying:

Matrix dimensions must agree.

Error in lab5_exercise2 (line 9)

y=sin(x.*z);

Answer 1

[Image Analyst]

Put the y= statement inside the loop:

x = -2*pi : pi/64 : 2*pi;
n = input('Enter a positive whole number: ');
for z = 1 : n
	y = sin(x.*z);
	plot(x,y, '.-');
	hold on;
end
grid on;
xlabel('x', 'FontSize', 15);
ylabel('Y', 'FontSize', 15);

[Colm Murphy]

That worked. Thank you.

Answer 2

[James Tursa]

Modifying your original code without a loop:

x=[-2*pi:pi/64:2*pi];
i = input('Enter a positive whole number: \n');
z=[1:i]'; % make this a column vector
y=sin(x.*z); % use implicit expansion
plot(x,y); % no need for a loop
grid on

Answer 3

[Navadeep Ganesh U]

use "hold on" for keeping plots.