Custom colored bar graph for a vector

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Sowmya MR
Sowmya MR 2016-3-29
评论： Chad Greene 2016-3-29
Hi, I have a vector x=[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15] and corresponding y=[1 2 3 1 1 1 2 3 3 1 3 3 3 2 3]. I should generate a bar plot {bar(x,y)} such that bar corresponding to different numbers are in different colors. For example: Bar color corresponding to 1's should be red, Bar color for all 2's should be yellow and so on....Can someone please help with this?

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Azzi Abdelmalek
Azzi Abdelmalek 2016-3-29
x=[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15]
y=[1 2 3 1 1 1 2 3 3 1 3 3 3 2 3]
cl='rgyb'
for k=1:numel(x)
bar(x(k),y(k),'FaceColor' ,cl(y(k)))
hold on
end
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Chad Greene
Chad Greene 2016-3-29
Nice! Or a more generalized form in case y = y+5;
x=[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15] ;
y=[1 2 3 1 1 1 2 3 3 1 3 3 3 2 3];
uniquey = unique(y);
Ncolors = length(uniquey);
hold on
cmap = jet(Ncolors);
for k = 1:length(x)
bar(x(k),y(y(k)),'facecolor',cmap(uniquey==y(k),:))
end
Chad Greene
Chad Greene 2016-3-29
Sowmya- To get the text labels put this at the end:
text(x,y,num2str(y'),'horiz','center','vert','bottom')
box off

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Chad Greene
Chad Greene 2016-3-29
编辑：Chad Greene 2016-3-29
You can set the facecolor of bar(s) when you call the bar function. Below I'm defining the rgb values of 15 colors with jet. The display is colorful, but perhaps not the most elegant design for data display. Fewer colors is usually better.
x=[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15] ;
y=[1 2 3 1 1 1 2 3 3 1 3 3 3 2 3];
hold on
cmap = jet(length(x));
for k = 1:length(x)
bar(x(x==x(k)),y(x==x(k)),'facecolor',cmap(k,:))
end

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