Different colors for each bar

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Rachele Franceschini 2022-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/1679819-different-colors-for-each-bar

评论： Cris LaPierre 2022-3-24

Hi, I have this problem. I have this data:

x=file.variable %file text (ABR CAM CAL BAS EML...etc)
y=file.variable %number (12 52 32 36 59....etc
z=file.variable %number (2.3 5.4 8.3 1.3....etc)

I would like a bar plot with different colors for each bar (on base of z value) using for example colorbar. Now I have this code, maybe there is some errors within function:

x = file.variable_text;
y = file.variable_number;
z = file.variable_percentage;
[~,arr] = sort(z,'ascend'); %order data
X = reordercats(categorical(x),x(arr));

How I can do?

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Answer 1

Cris LaPierre 2022-3-24

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在 MATLAB Online 中打开

Perhaps this example from the bar documentation page will help.

b = bar(rand(10,1));

b.FaceColor = 'flat';

b.CData(2,:) = [.5 0 .5];

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Rachele Franceschini 2022-3-24

But I should change color for each bar (I have 20 bar). But, a way exists to get gradual color changing on base of data (in my case z)?

Cris LaPierre 2022-3-24

My reading of the documentation would indicate this is the recommended approach for setting bar color. There does not appear to be an option to automatically set the color based on value.

See this answer for more.

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