How to have a function return a coordinate point?

I am trying to get a function to return (x,y) coordinates for a given angle theta. I am struggling to figure out how to get the output of the function to be coordinate points and not two seperate variables x and y.

This is what I have for the function:

function [x,y] = unitCircle(theta)
[x,y] = [cos(theta),sin(theta)]
end

And when I call the function using:

[x,y] = unitCircle(pi/4)

I get an error:

Too many output arguments.

Error in unitCircle (line 2)

[x,y] = [cos(theta),sin(theta)]

[Voss]

function [x,y] = unitCircle(theta)
x = cos(theta);
y = sin(theta);
end

Answer 1

[Torsten]

[x,y] = unitCircle(pi/4)

x = 0.7071

y = 0.7071

function [x y] = unitCircle(theta)
  z = [cos(theta),sin(theta)];
  x = z(1);
  y = z(2);
end

[Connor]

Thank you :)

[Sulaymon Eshkabilov]

There is an error in your accepted answer (proposed by Torsten). Note this code is not consistent and does not deliver (solve) for all possible values of theta. Wrong.

theta = -pi:.1:pi;
[x,y]=unitCircle(theta)

function [x y] = unitCircle(theta)
  z = [cos(theta),sin(theta)];
  x = z(1);
  y = z(2);
end

[Sulaymon Eshkabilov]

This function file syntax has to be:

theta = -pi:.1:pi;
[x,y]=unitCircle(theta)

x = 1×63

-1.0000 -0.9950 -0.9801 -0.9553 -0.9211 -0.8776 -0.8253 -0.7648 -0.6967 -0.6216 -0.5403 -0.4536 -0.3624 -0.2675 -0.1700 -0.0707 0.0292 0.1288 0.2272 0.3233 0.4161 0.5048 0.5885 0.6663 0.7374 0.8011 0.8569 0.9041 0.9422 0.9710

y = 1×63

-0.0000 -0.0998 -0.1987 -0.2955 -0.3894 -0.4794 -0.5646 -0.6442 -0.7174 -0.7833 -0.8415 -0.8912 -0.9320 -0.9636 -0.9854 -0.9975 -0.9996 -0.9917 -0.9738 -0.9463 -0.9093 -0.8632 -0.8085 -0.7457 -0.6755 -0.5985 -0.5155 -0.4274 -0.3350 -0.2392

function [x y] = unitCircle(theta)
  z = [cos(theta);sin(theta)];
  x = z(1,:);
  y = z(2,:);
end

[Torsten]

Doesn't work :-)

theta = (-pi:.1:pi).';
[x,y]=unitCircle(theta)

x = -1

y = -0.9950

function [x y] = unitCircle(theta)
z = [cos(theta);sin(theta)];
x = z(1,:);
y = z(2,:);
end

Answer 2

[Sulaymon Eshkabilov]

Here is the corrected code:

% Ver 1
xy = unitCircle(pi/4)

xy = 2×1

0.7071 0.7071

function xy = unitCircle(theta)
xy=[cos(theta); sin(theta)];
end

[Sulaymon Eshkabilov]

Alt. version:

% Ver 2
theta = linspace(-2*pi, 2*pi);
xy=unitCircle(theta);
plot(xy(1,:), xy(2,:)), axis equal;
xlabel("x"), ylabel("y"), grid on

function xy = unitCircle(theta)
xy(1,:)=[cos(theta)]; 
xy(2,:)=[sin(theta)];
end