The colors displayed in the legend do not match the plot colors.

This is my code,

 colors = ['r';'m';'b';'g';'c']; 
symbols = ['*-';'+-';'*-';'+-';'*-'];

 for k1 = 1:5
colsym = [colors(k1),symbols(k1,1:2)];

 plot(x, y, colsym)

 hold on

 end

 legend('-0.02','-0.01','0','0.01','0.02')

Thanks in advance.

Answer 1

[Mischa Kim]

Hello Priya, not sure how you have defined your y, so check out the code below:

 xCenter = 0;
 yCenter = 0;
 theta   = 0 : 0.01 : 2*pi;

 colors  = ['r';'m';'b';'g';'c'];
 symbols = ['*-';'+-';'*-';'+-';'*-'];
 for k1 = 1:5
    xRadius = k1;
    yRadius = 5/k1;
    x       = xRadius * cos(theta) + xCenter;
    y       = yRadius * sin(theta) + yCenter;

    colsym = [colors(k1),symbols(k1,1:2)];
    plot(x, y, colsym)
    hold on
 end
 legend('-0.02','-0.01','0','0.01','0.02')

[Mischa Kim]

I assume your y is a k1-by-N array (just like in my example above). What happens if you replace your plot command with mine?

[Priya]

I get this,

Index exceeds matrix dimensions.

Error in test_contact_ellipse (line 232) plot(x, y(k1,:), colsym)

Actually, in the link , I have made some changes to my code which is nothing but placing my entire code into a for loop.

[Mischa Kim]

See updated code above. The four lines succeeding the for command need to/can be adapted/moved.