我有一组数据Y v / s X(~20k数据点),当绘制时是散射。我想为Y的范围绘制Y的误差条(例如,X轴的长度为100,然后我希望误差条表示每10个X单位的Y的标准偏差)
答案 0 :(得分:2)
这是一个尝试:
N = 100; % Number of points
n = 10; % Number of x-bins
% Define and plot points
x = rand(N,1);
y = x.*rand(N,1);
scatter(x, y, '+');
% Define errorbar
bin = linspace(min(x), max(x), n+1);
ind = sum(bsxfun(@minus, x, ones(N,1)*bin)>=0,2);
m = NaN(n,1);
e = NaN(n,1);
for i = 1:n
m(i) = mean(y(ind==i)); % Mean value over the bin
e(i) = std(y(ind==i)); % Standard deviation
end
hold on
u = (bin(1:end-1)+bin(2:end))/2;
errorbar(u,m,e,'k');
希望这有帮助。