simple error on plotting

Dear There, I got an unknown error on plotting so simple function. My function is:

function test
x = 0:pi/100:2*pi;
y = sin(x);
plot (x,y)
end

I am really confused why I get this unknown error:

Error using plot

Too many input arguments.

Error in test2 (line 4)

plot (x,y)

Thanks in advance

Answer 1

[Thorsten]

It works for me. Try

clear
test2

and look which plot function you are actually using

which plot

BTW: linspace is a nice way to get some evenly spaced numbers

 x = linspace(0, 2*pi); % default is 100 values

or

 x = linspace(0, 2*pi, 200); % if you need more

Answer 2

[Ingrid]

this should work, are you sure that you have not redefined the plot function or used it as a variable name?