How to plot multiple boxes with x and y being names

Hi everybody,

Does anyone know how to plot graphs like: http://people.sc.fsu.edu/~jburkardt/m_src/box_plot/clay.png ? With colors being only red, green or the box being blank.

But with text on x and y.

Any help will be much appreciated.

Best regards,

Eric

Answer 1

[Geoff Hayes]

Eric - there are probably several ways to do this. One such way is to use fill to create the coloured squares. For example,

 n = 5; % number of squares along x and y

 % create the figure
 figure;
 hold on;
 axis equal;

 % width of square divided by two
 sqrWidthBy2  = 0.45;

 % set the axis limits
 axis([sqrWidthBy2 n+sqrWidthBy2 sqrWidthBy2 n+sqrWidthBy2]);

 % array for the fill graphic object handles
 sqHandles = zeros(n,n);

 % array of colours (white/blank, red, green)
 colours   = ['w','r','g'];

 % loops to create the squares
 for x=1:n
    for y=1:n
        clr = colours(randi(3));
        sqHandles(x,y) = fill([x-sqrWidthBy2 x+sqrWidthBy2 x+sqrWidthBy2 x-sqrWidthBy2 x-sqrWidthBy2],...
                              [y-sqrWidthBy2 y-sqrWidthBy2 y+sqrWidthBy2 y+sqrWidthBy2 y-sqrWidthBy2],clr);
    end
 end

To "write" text instead of numbers along the x and y axes, we can manipulate the ticks and tick labels of the axis. Something like

 set(gca,'YTick',1:n,'YTickLabel',cellstr(char(randi(26,n,1)+64)));
 set(gca,'XTick',1:n,'XTickLabel',cellstr(char(randi(26,n,1)+64)));

The above just adds a random character at the integer positions along the x and y axes. You can modify the above to write strings instead of single characters.