how to plot 40 different colors in matlab graph

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jaah navi 2019-2-22

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https://ww2.mathworks.cn/matlabcentral/answers/446368-how-to-plot-40-different-colors-in-matlab-graph

评论： Thomas Dixon 2021-2-1

i am plotting 200 users in a cells.

Among 200 users first five users should be in one color,next five in other color,and so on till i have plotted all 200users.

So totally i need 40 different colors to differentiate them.

I mentioned 8 colors using( 'm','g','y','b','r','c','w','k').How can I represent the rest of 32 colors in graph.

Could anyone please help me on this.

采纳的回答

Image Analyst 2021-1-14

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https://ww2.mathworks.cn/matlabcentral/answers/446368-how-to-plot-40-different-colors-in-matlab-graph#answer_597558

在 MATLAB Online 中打开

jaah:

Try this:

% x and y are your data, in rows of a matrix.
numDataSets = size(x, 1); % For example 200
plotColors = jet(numDataSets/5); % 40 different colors.
for row = 1 : numDataSets
    % Extract this particular set of (x,y) coordinates from the whole data set.
    thisX = x(row, :);
    thisY = y(row, :);
    % Now plot just this one.
    thisIndex = ceil(row/5);
    thisColor = plotColors(thisIndex, :);
    plot(thisX, thisY, '-', 'Color', thisColor, 'LineWidth', 2);
    hold on;  % Leave plots up so we'll see all of them at the end.
end
grid on;
xlabel('x', 'FontSize', 20);
ylabel('y', 'FontSize', 20);
title('Demo by Image Analyst', 'FontSize', 20);

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Thomas Dixon 2021-2-1

Thanks you!!!

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Rakhi Agarwal 2019-2-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446368-how-to-plot-40-different-colors-in-matlab-graph#answer_362219

Colors in Matlab plot that you are using are basically RGB triplets. For example

blue b [0,0,1]

black k [0,0,0]

red r [1,0,0]

green g [0,1,0]

white w [1,1,1] etc.

You can define more colors using RGB triplets. You can specify colors using a vector. Usually RGB colors have values from 0 to 255. You can use those numbers and divide the vector by 255 to use within MATLAB. You can put in the RGB triplet (as a vector) directly into the plot command.

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Thomas Dixon 2021-1-13

I am adding this so i can follow activity

Image Analyst 2021-1-14

在 MATLAB Online 中打开

Thomas, yes, for example

% x and y are your data, in rows of a matrix.
numDataSets = size(x, 1);
plotColors = jet(numDataSets);
for row = 1 : numDataSets
    % Extract this particular set of (x,y) coordinates from the whole data set.
    thisX = x(row, :);
    thisY = y(row, :);
    % Now plot just this one.
    plot(thisX, thisY, '-', 'Color', plotColors(row, :), 'LineWidth', 2);
    hold on;  % Leave plots up so we'll see all of them at the end.
end
grid on;
xlabel('x', 'FontSize', 20);
ylabel('y', 'FontSize', 20);
title('Demo by Image Analyst', 'FontSize', 20);