Horizontal bar plot with patch

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Sowmya MR
Sowmya MR 2018-1-24
评论： Star Strider 2018-1-24
Hi All,
I have the following code. Now if i do plot(t,v1), will get a plot. But what i want is just one horizontal light colored strip and the value of v1 centered within the box. Have attached an example in this email
. Can someone please help me with this?
v1=[zeros(5,1);ones(10,1);2*ones(10,1);3*ones(10,1);2*ones(12,1);ones(2,1);zeros(5,1)];
t=1:54;
plot(t,v1)

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回答（1 个）

Star Strider
Star Strider 2018-1-24
Try this:
figure
patch([0 1 1 0],[0 0 1 1], [0.9 0.1 0.1])
hold on
patch([0 1 1 0]+1,[0 0 1 1], [0.7 0.0 0.1])
patch([0 1 1 0]+2,[0 0 1 1], [0.9 0.1 0.1])
hold off
axis equal
text([0.5 1.5 2.5], [0.5 0.5 0.5], {'0', '20', '0'})
Experiment with the text and RGB colour triplets to get the result you want.
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Sowmya MR
Sowmya MR 2018-1-24
Thank you. Can this be done in automated way for any length of vector v1?
Star Strider
Star Strider 2018-1-24
My pleasure.
You have to redefine ‘v1’ as a matrix of amplitudes and lengths (that I call ‘V1’, then it is straightforward to automate it:
V1 = [0 5; 1 10; 2 10; 3 10; 2 12; 1 2; 0 5]; % V1 = [Amplitude Length] Pairs In Each Row
V1L = [0; cumsum(V1(:,2))]; % Cumulative Lengths
figure
AxH = axes('NextPlot','add');
for k1 = 1:size(V1,1)
patch([0 1 1 0]*V1(k1,2)+V1L(k1),[0 0 1 1]*V1(k1,1), rand(1,3), 'LineWidth',0.1)
end
hold off
This seems to be robust. (I used random colours.)
Experiment to get the result you want.

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