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Unrecognized function or variable 'Plot_circle'

3 次查看（过去 30 天）
Carlos Mario Zapata
回答： Image Analyst 2023-1-14
Hi everybody,
I am new in matlab, and I am trying to make a graph which contains circles of the same radio randomly distributed in a square. I am trying to build it as a function which I can change the number of circles into the square and the radio.
This is the function:
function circle= Generate_circle (x,y,r,N)
%input:
%x=[x1 x2]boundaries of the box
%y=[y1 y2]boundaries of the box
%r: radio of circles
%N: Number of circles
%output
for i=1:1:N
while 1
x1=min(x)+(max(x)-min(x))*rand(1);
y1=min(y)+(max(y)-min(y))*rand(1);
%Define theta range
theta=pi/2*rand(1);
v=2*rand(1)-1;
x2=x1+r*sqrt(1-v^2)*cos(theta);
y2=y1+r*sqrt(1-v^2)*sin(theta);
if x2<=x(2) && x2>=x(1) && y2<=y(2) && y2>=y(1)
break;
end
end
circle(i,1)=x1;
circle(i,2)=y1;
circle(i,3)=x2;
circle(i,4)=y2;
end
Then, I called the function to produce the coordinates and to do the plot as follow:
clc; clear; close all;
x=[0 100];
y=[0 100];
N=11;
r=5;
circle = Generate_circle (x,y,r,N);
Plot_circle(x,y,circle);
It does produce the coordinates, it does not plot it. Can anyone tell me where I am failling in the code. Thank in advance

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回答（1 个）

Image Analyst
Image Analyst 2023-1-14
Ran in:
Try it this way, using viscircles in the Image Processing Toolbox:
clc; % Clear the command window.
%fprintf('Beginning to run %s.m ...\n', mfilename);
close all; % Close all figures (except those of imtool.)
clearvars;
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 18;
% Then, I called the function to produce the coordinates and to do the plot as follow:
x=[0 100];
y=[0 100];
N=11;
r=5;
circle = Generate_circle (x,y,r,N);
% Get centers
xCenters = mean(circle(:, [1,3]), 2);
yCenters = mean(circle(:, [2,4]), 2);
viscircles([xCenters, yCenters], r);
grid on;
axis equal;
function circle = Generate_circle (x,y,r,N)
%input:
%x=[x1 x2]boundaries of the box
%y=[y1 y2]boundaries of the box
%r: radio of circles
%N: Number of circles
%output
for i=1:1:N
while 1
x1=min(x)+(max(x)-min(x))*rand(1);
y1=min(y)+(max(y)-min(y))*rand(1);
%Define theta range
theta=pi/2*rand(1);
v=2*rand(1)-1;
x2=x1+r*sqrt(1-v^2)*cos(theta);
y2=y1+r*sqrt(1-v^2)*sin(theta);
if x2<=x(2) && x2>=x(1) && y2<=y(2) && y2>=y(1)
break;
end
end
circle(i,1)=x1;
circle(i,2)=y1;
circle(i,3)=x2;
circle(i,4)=y2;
end
end

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