Drawing a color map of accuracy distribution

Hi I have two matrices: one stores the indices of rectangles' locations on the screen and the other stores the accuracy information in the corresponding location.

For example:

 RectMat =

   155    95   189   129
   223    95   257   129
   291    95   325   129
   359    95   393   129 
   427    95   461   129
   495    95   529   129

 Accuracy =  

 0.2
 0.4
 0.6
 0.8
 0.9
 1.0

Now I need to plot such an accuracy distribution map: rectangles will be drawn as to match the locations and the color of the rectangles should depend on the accuracy value in that specific location, e.g. RED for 100% and BLUE for 0%.

Also, I need a color bar presented beside the figure to show how the colors represent the accuracy.

I also need it to include, at least, 11 colors (0%:10%:100%) and I can manage the color properties.

Could anyone please help me with this?

Thanks a lot!

Best, Leo

[Daniel Shub]

This sounds pretty doable. What have you tried so far?

Answer 1

[Image Analyst]

Have you tried anything like this yet? You simply figure out the color for that Accuracy, and call rectangle() with the 'EdgeColor' of that particular color.

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
workspace;  % Make sure the workspace panel is showing.
RectMat =[...
  155    95   189   129
  223    95   257   129
  291    95   325   129
  359    95   393   129 
  427    95   461   129
  495    95   529   129]

Accuracy =  [...
  0.2
  0.4
  0.6
  0.8
  0.9
  1.0]

% Create some custom colormap with 11 elements, such as the jet one.
myColors = jet(11)

numberOfRectangles = size(RectMat, 1);
for r = 1 : numberOfRectangles
  % Get the Accuracy for this rectangle and
  % figure out the color row in the colormap for this Accuracy.
  colorRow = int32(Accuracy(r) * 10);

  % Plot the rectangle with that color.
  rectangle('Position', RectMat(r, :), ...
  'EdgeColor', myColors(colorRow,:),...
  'LineWidth', 3);
end
grid on;
% Enlarge figure to full screen.
set(gcf, 'units','normalized','outerposition',[0 0 1 1]);

[Pan]

Thanks a lot!

Although finally I used "fill" function to draw the rectangles, you've provided me quite helpful suggestions :)

[Image Analyst]

So can we mark this as "solved"?