Filling Area with gray color scale.

I am working on a figure and a came up with a surface area which is cone shape(plotted by two variables X and Y), and has five layers. I want to fill the area of each layer based on the intensity of gray color represented by matrix Z. The figures changes therefore i cannot save it first and modify it rather I want to modify it on the plot as facecolor. When I use imshow(I, []);, the two figures are plotted differently.

How can I fill the area (Area) with various layers of imshow(I, []) colors? Be free to use ant example or linspace to generate X, Y and Z values.

X=[j,i]; % currently j=5,the maximum value of L i=301 ,but this can change based on the variable.
  Y=[j,i]; % Y is not directly related to X, but the size varies.
  Z=[j,i-1]; % Z varies from 0 to max of 100 and is set to represent a measure of the intensity of the gray color
I = mat2gray(Z,[0 max(max(Z))]);
imshow(I, []);
  Color=['I' 'r' 'c' 'm' 'k'];
  figure(14)
  hold on
  for j=L:-1:1                           % is set currently at 5.
      Area(j,:)=area(X(j,:),Y(j,:),'FaceColor',Color(j));  %Area layers.
  end

[KSSV]

What is that area you are trying to fill? Polygon? REctangle? what?

[DAVID OYUGI]

The area is stack of cones. Each cone has different intensity of gray color scale. See pgn plot attached below.

[KSSV]

The code has errors......post the complete code with all values defined.

[DAVID OYUGI]

Thanks so much for your quick response. Look at this whole code and the attached excell for the values of X,Y and Z.

% Color Intensity variation over area stack.
L=5;
for j=1:L
    X=Xvalues(j,:);
    Y=Yvalues(j,:);
    Z=Zvalues(j,:);
end

I = mat2gray(Z,[0 max(max(Z))]);
 imshow(I, []);
 Color=['w' 'w' 'w' 'w' 'w'];
figure(14)
  hold on
  for j=L:-1:1
      Ar(j,:)=area(X(j,:)*1000,(Y(j,:)*1000),'FaceColor',Color(j));
      Ar(j,:)=area(X(j,:)*1000,(Y(j,:)*1000)*-1,'FaceColor',Color(j));
  end

axis([0 350 -100 100]);
grid on
box on
set(gca,'linewidth',1)

[DAVID OYUGI]

The X,Y and Z values matlab format.

[KSSV]

I think you need to have a clear idea on what you want. The size of X is 5x302 and Y is 5x580. You cannot plot them using area or plot or patch or fill. What data it is?

[KSSV]

The mat files has some data.

 load('Xvalues.mat')
load('Yvalues.mat')
load('Zvalues.mat')
surf(h,SL)

Is this what you want?

[DAVID OYUGI]

Thanks. May be have a look at the figure I have ploted (attached). I need to fill each regiuon of the triangular like shape with grat color. May be we can just think of one area(one triangular region). Instead of using the facecolor, how can I ensure that the face is filled with gray color generated by a matrix, in this case Z ?

[DAVID OYUGI]

The figure is plotted out with values, SL=Xvalues, h=Yvalues and AFR=Zvalues as attached. But the idea is just how can I fill the area.

[DAVID OYUGI]

Thanks one again. If I use (surf(h,SL)), the shape is rectangle.

Run the modified code below with the earlier attached matlab data, then may be you can get my case.The only part of this code I need modification is how to replace the white color with gray color scale generated by matrix AFR(or h).

Sorry for not be clear.

% Color Intensity variation over area stack.

L=5;

for j=1:L

X(j,:)=SL(j,:);

Y(j,:)=h(j,:);

Z(j,:)=AFR(j,:);

end

% I = mat2gray(Z,[0 max(max(Z))]);

% imshow(I, []);

Color=['w' 'w' 'w' 'w' 'w'];

figure(14)

hold on

for j=L:-1:1

Ar(j,:)=area(X(j,:)*1000,(Y(j,:)*1000),'FaceColor',Color(j));

Ar(j,:)=area(X(j,:)*1000,(Y(j,:)*1000)*-1,'FaceColor',Color(j));

end

axis([0 350 -100 100]);

grid on

box on

set(gca,'linewidth',1)