Add background color for some values in a plot of two two variables

2 次查看（过去 30 天）
Muhammad Usman
Muhammad Usman 2022-9-14
评论： Ben 2022-9-23
Hi everyone. I have two variables av1 and av2. Each variables have 114 data points. I want to draw it in same figure but at same time and point I also want to calculate p value from ttest between av1 and av2. So if the significance difference is less then 0.05 at that data point it should draw a background colour. I attached the figure.

请先登录，再回答此问题。

回答（1 个）

Ben
Ben 2022-9-14
编辑：Ben 2022-9-16
Ran in:
You can plot a bar graph and then set the FaceAlpha to less than 1.
x = [0 1 2 2 3 4 4 6 7 7];
y = [1 2 2 3 4.5 4.5 6 7];
p = [2.15e-12 2.72e-11 2.397e-10 0.0600 5.613e-09 1.803e-08 4.831e-08...
8.945e-08 1.874e-07 2.894e-07];
plot(x,'b')
hold on;
plot(y, 'k')
ax = gca; %Get axis size info
ylimVals = ax.YLim; %Y limits
scaleFact = max(ylimVals);
b1 = bar(scaleFact*(p < 0.05),'b'); %plot blue bar graph
b1.FaceAlpha = 0.5; %Set transparency to 50%
b1.EdgeAlpha = 0; %Maybe you want no outline on the bar
ylim(ylimVals); %Set ylim correctly
uistack(b1, 'bottom') %Move background below other elements
  5 个评论
显示 3更早的评论
Ben
Ben 2022-9-16
I've edited my answer and tested the code locally with your data and think it does what you want.
I think the key understanding here is that you don't need to loop through p. MATLAB allows vector calculations, so you can check every cell in p at once.
out = p < 0.05;
Out will be a logical index (that is, 1 where p < 0.05, 0 otherwise) with the same length as p. You can then plot the logical index with a scaling factor to get the background at a consistent height.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Line Plots 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by