How to plot every combination of a function?

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Jannen Paiva
Jannen Paiva 2015-3-13
评论： Jannen Paiva 2015-3-13
x= A + cos(theta) y= sin(theta) - A
The x and y coordinates are parametrised by A and theta
Is there a way to plot graphs for every combination of 0<A<20 and 0<theta<360 ?

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回答（2 个）

Image Analyst
Image Analyst 2015-3-13
Have you tried meshgrid to give every combination:
a = 1:2:20
th = 0:20:360;
[A, theta] = meshgrid(a, th);
x= A + cos(theta);
y= sin(theta) - A
plot(x, y);
  1 个评论
Jannen Paiva
Jannen Paiva 2015-3-13
Would this also work if x and y were parametrised by any number of variables? eg. (a, b, c, th1, th2)

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Star Strider
Star Strider 2015-3-13
For all values of both variables, you get a patch plot:
x = @(theta,A) A + cosd(theta);
y = @(theta,A) sind(theta) - A;
theta = linspace(0, 360, 360);
figure(1)
subplot(2,1,1)
patch([theta, fliplr(theta)], [x(theta,0), fliplr(x(theta,20))], 'b')
title('X')
axis([0 360 ylim])
grid
subplot(2,1,2)
patch([theta, fliplr(theta)], [y(theta,0), fliplr(y(theta,20))], 'b')
title('Y')
axis([0 360 ylim])
grid

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