How to select different colors and legend for the bar plot??

Question

BN 2020-7-27

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评论： BN 2020-7-29

Hello everyone, I plot this bar plot in order to show the difference between each model (3 models) in condition A and condition B. x = rand(3,2);

x = rand(3,2);
h = bar (x);

I want to set, for example, red for the first model in condition A and blue for condition B (In this model).

As well as two different colors like green and yellow for the second model in each condition. Like this plot below:

And also, set the corresponding legend for each color. So I want to have 6 items in legend (different colors).

Any suggestion is really helpful

Thank you.

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Answer 1

Turlough Hughes 2020-7-27

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编辑：Turlough Hughes 2020-7-27

在 MATLAB Online 中打开

For the first part of your question, you can do so as follows:

x = rand(3,2);
h = bar (x);
h(1).FaceColor = 'red'
h(2).FaceColor = 'blue'

For the second part, patterned face colours aren't provided for with the bar() function. When you plot a bar chart such as:

h = bar(rand(3,6))

you can continue to modify the colors of any model using the same procedure as above. Additionally the legend will update for you accordingly:

legend('model A','model B','model C','model D','model E','model F')

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Turlough Hughes 2020-7-27

编辑：Turlough Hughes 2020-7-27

在 MATLAB Online 中打开

You could do the following:

data = rand(1,6);
groupSize = 2;
figure(), hold on
x = 0;
for c = 1:numel(data)
    x = x + 1;
    b(c) = bar(x,data(c));
    if mod(c,groupSize)==0 %after each group skip a position on the x axis
        x = x + 1;
    end
end
spacing = groupSize+1;
ax = gca; 
ax.XTick = spacing/2:spacing:v-spacing/2;
ax.XTickLabel = {'model 1','model 2','model 3'};

Turlough Hughes 2020-7-27

在 MATLAB Online 中打开

You can modify the individual bars then as follows:

b(3).FaceColor = 'g';
b(4).FaceColor = 'm';
b(5).FaceColor = 'k';
b(6).FaceColor = 'y';

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Answer 2

Sugar Daddy 2020-7-27

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编辑：Sugar Daddy 2020-7-27

在 MATLAB Online 中打开

2nd Part of Question (Pattern Face)

This code is computation intesive and is just for display purpose. (considering that max value is less than 1)

figure,
x = rand(3,2);
c = [1 2 3];
h = bar (c,x,'BarWidth',1);
h(2).FaceColor = 'none';
h(2).LineWidth = 2;
%
jj = 1;
hold on
%
a =gca; clr_array = a.ColorOrder;
for mm = 1:3
for i = x(mm,2):-.01:0
if(jj == 1)
    jj = 2;
    bar(mm,[0;i],'FaceColor','w','EdgeColor','none','BarWidth',1)
else
    bar(mm,[0;i],'FaceColor',clr_array(mm,:),'EdgeColor','none','BarWidth',1)
    jj = 1;
end
end
bar(mm,[x(mm,1);0],'FaceColor',clr_array(mm,:),'LineWidth',2,'BarWidth',1)
bar(mm,[0;x(mm,2)],'FaceColor','none','LineWidth',2,'BarWidth',1)
end