plot polygon function error

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msh jgtu
msh jgtu 2019-12-22
评论： Matt J 2019-12-23
I want to draw polygon of some data Ki_bounds(:,1) ,Kp_range
I coded polygon function
function polygon( x,y )
function polygon( x,y )
%UNTITLED4 Summary of this function goes here
% Detailed explanation goes here
plot(x,y)
axis([-1 1 -1.6 1])
end
then i called it in main
x=[ Ki_bounds(:,1); flipud(Ki_bounds(:,1))]
y=[Kp_range; flipud(Kp_range);];
poly_set= polygon(x,y);
but it gives error
Error using polygon
Too many output arguments.

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回答（1 个）

David Goodmanson
David Goodmanson 2019-12-22
编辑：David Goodmanson 2019-12-22
Hi msh,
the reason is pretty simple. You are asking for an output from the function, but you have not provided any in its definition.
Had you written
function z = polygon( x,y )
%UNTITLED4 Summary of this function goes here
% Detailed explanation goes here
plot(x,y)
axis([-1 1 -1.6 1])
z = (whatever)
end
then the call would have worked. Or you can leave the function as is and just call it:
polygon(x,y)
  1 个评论
Matt J
Matt J 2019-12-23
msh jgtu's answer converted to comment:
yes the function works without using z, the problem came when i use poly_set= polygon(x,y)
i want to use the polygon in Math operation so i used polyset this gives the error

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