Colored Hexagons using Patch

Hi to everyone, I was trying to make a honeycomb with Matlab, I've had no problem with the structure but I've some trouble trying to colour those hexagons with some defined color (e.g. red, blue and violet). This is the way I get the hexagons:

theta=0:60:360;
x=sind(theta); 
y=cosd(theta);
v=x(2); 
for i=1:4; x=x+v*2; a(i,:)=x; b(i,:)=y; %Create the row
end
c=a'; d=b';
for j=1:4; e=d+1.5*j; re=rem(j,2); %Create the columns
  if re==0, g=c; 
  else g=c-v; 
  end
  colour=linspace(0,1,i)
  patch(g,e,colour)
end
hold on
patch(c,d,colour)

But the colour is not specified by me, but is randomly chosen from 0 to 1.

I've read the help but I don't get the point.

Thanks in advance to everyone!!

Answer 1

[Image Analyst]

Replace this:

colour=linspace(0,1,i)
patch(g,e,colour)

with this

% Define color with whatever values you need for the color you want.
colour=[1, 0.4, 0.5];  % Any 3 values between 0 and 1, or predefined colors 'r', 'b', 'y', etc.
patch(g,e,colour);

[stefano stefano]

Thanks for your reply, what I get with your code is a colouration per rows, like

But I want to be able to colour each element of a row with a different colour and make a permutation over the index of the column to obtain a result like

[Mike Garrity]

What I did in the blog post that picture came from was this:

cindex = 1+mod(2*mod(i,2) + 1*mod(j,2),7);

Did you try that? The basic idea is to have both your row index and column index go into generating the color.

[stefano stefano]

I see your answer just now: I was inspired by your post on the blog and I want to try a 2-d version!

 theta=0:pi/3:2*pi;
x=sin(theta);
y=cos(theta);
v=x(2);
u=y(1)+y(2);
for i=1:columns;
    x=x+v*2;
    a(i,:)=x; b(i,:)=y;
    c=a'; d=b';
    r1=rem(i,2);
    if r1==0, col1(i)='r';
    else col1(i)='c';
    end
    axis equal
    patch(c(:,i),d(:,i),col1(i)); 
    for k=1:rows/2;
        g=d+3*k;
        patch(c(:,i),g(:,i),col1(i))
    end
end
for j=1:columns;
    e=c-v; f=d+u;
    r2=rem(j,2);
    if r2==0, col2(j)='y';
    else col2(j)='m';
    end
    patch(e(:,j),f(:,j),col2(j))
    for h=1:rows/2;
        l=f+3*h;
        patch(e(:,j),l(:,j),col2(j))
    end
end

I'm now able to realize the image but I'm not able to find the proper colours as yours, can you please give me a hint?

Thanks

Answer 2

[stefano stefano]

Finally I came to the solution by creating my own color map; The result is this:

Thanks to everyone!

[teimurazi gochitashvili]

Can you please upload final code?

[Image Analyst]

Looks like the same as his comment

https://www.mathworks.com/matlabcentral/answers/282942-colored-exagons-using-patch#comment_364681

just with a different set of colors.