Errorbar plotting in MATLAB

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Aniruddha Das
Aniruddha Das 2021-4-2
评论： Aniruddha Das 2021-4-5
I have 3 vectors which contains numerical data. I can calculate the median, positive and Negative standard deviation of these numbers for each vector. I want to plot these 3 vectors in a single graph showing errorbars and also want to visualise each datapoint of each vector in different colors. How to do that?
  2 个评论
dpb
dpb 2021-4-2
What did you try using errorbar and where did you get stuck, specifically?
I don't know what a "negative standard deviation" is; perhaps you just mean the negative errorbar error value? Unless use asymmetric error values, you only pass one error value for errorbar
You don't give any klews as to what you would want to do about using the median for something; perhaps you might also want to look at Box plots...the boxplot function in ML.

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Meg Noah
Meg Noah 2021-4-2
编辑：Meg Noah 2021-4-2
vec1 = rand(20,1);
vec2 = 20*rand(20,1)-15*rand(20,1);
vec3 = 3*rand(20,1);
med = [median(vec1) median(vec2) median(vec3)];
pos = [3*std(vec1) 3*std(vec2) 3*std(vec3)];
neg = [std(vec1) std(vec2) std(vec3)];
for ivec = 1:3
errorbar(ivec,med(ivec),pos(ivec),neg(ivec),'.','DisplayName',['Vector ' num2str(ivec)]);
hold on;
end
xlim([0 4]);
legend('location','best');
% all the data on one plot with error bars
figure();
errorbar([1:20]',vec1,pos(1)*ones(20,1),neg(1)*ones(20,1),'.','DisplayName','Vector 1');
hold on;
errorbar([1:20]',vec2,pos(2)*ones(20,1),neg(2)*ones(20,1),'.','DisplayName','Vector 2');
errorbar([1:20]',vec3,pos(3)*ones(20,1),neg(3)*ones(20,1),'.','DisplayName','Vector 3');
xlim([0 21]);
legend('location','best');

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