How do I plot x,y, and an intensity value on an xy-plane with the intensity on a color scale?
2 views (last 30 days)
Show older comments
I have this code right now:
% Make an image of the points, then apply a colormap
x = x(:); % Extract x value
y = y(:); % Extract y value
v=v(:);
%find max and min values
minX = min(x,[],1);
maxX = max(x,[],1);
minY = min(y,[],1);
maxY = max(y,[],1);
%dealing with NaN
v(isnan(v)) = 0; %set all NaN to zero
minV=0;
maxV=max(v,[],1);
% Make image be 500 by 700
rows = 500;
columns = 700;
grayImage = zeros(rows, columns, 'uint8');
for k = 1 : length(x)
row = ceil((y(k) - minY) * rows / (maxY - minY));
column = ceil((x(k) - minX) * columns / (maxX - minX));
if (row == 0)
row = 1;
end
if (column == 0)
column = 1;
end
grayImage(row, column) = uint8(255 * (v(k) - minV) / (maxV - minV));
end
imshow(grayImage);
colorbar;
% Colormap is not gray scale.
% Apply some other colormap if you want
colormap(jet(256))
0 Comments
Answers (1)
See Also
Categories
Find more on Red in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!