How to get the rgb code from Matlab figure

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Khalid Ibne Masood
Khalid Ibne Masood 2020-4-29
编辑： Adam Danz 2020-4-29
Hello Everyone,
I have attached a matlab figure here. This plot was generated from Matlab and I need to know the RGB color code for each color used in this picture. I know that there are exactly 5 colors have been used for this plot, I need to extract these 5 colors. Please help me to solve this problem.
Thank you.
Khalid
  2 个评论
Adam Danz
Adam Danz 2020-4-29
编辑：Adam Danz 2020-4-29
Do you have the fig file (if so, attach it) and do you know which function was used to generate the plot?
Khalid Ibne Masood
Khalid Ibne Masood 2020-4-29
Hello Adam,
Thank you, here I have attached the .fig file.
I believe 'surf' was used to generate the plot.
Thank you.
Khalid

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采纳的回答

Adam Danz
Adam Danz 2020-4-29
编辑：Adam Danz 2020-4-29
Retreiving the colors from a surface plot can be trickly due to the interaction between the color properties of a surface object. If you plan to apply this solution to a variety of surface plots with varying color properties, you'll need to carefully read about the color properties and how they interact with eachother: https://www.mathworks.com/help/matlab/ref/matlab.graphics.chart.primitive.surface-properties.html#d120e1097631
See inline comments for details.
% Open the figure
fig = openfig('Question.fig');
% Find the axis handle
ax = findobj(fig, 'Type', 'axes');
% Find the surface handle
surfObj = ax.Children;
% Get the colormap
cmap = ax.Colormap;
% scale the color data values to the range of the
% colormap to match the color data with the colormap rows.
cval = round((surfObj.CData - ax.CLim(1))./range(ax.CLim) .* (size(cmap,1)-1)) +1;
% List the unique colors in order from left to right.
uniqueRGB = cmap(unique(cval(:),'stable'),:);
Results:
uniqueRGB =
0.5 0 0
0.9375 1 0.0625
0.5625 1 0.4375
0.4375 1 0.5625
0 0 0.5625
Plot a large dot above each color section to check the results
% Add dots to plot to confirm color
hold on
h = scatter3([.1 .35 .6 .80 .95], repmat(1,1,size(uniqueRGB,1)), repmat(max(ax.ZLim),1,size(uniqueRGB,1)), ...
200, uniqueRGB, 'filled', 'MarkerEdgeColor', 'k', 'LineWidth', 2);

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