How to find letters indicating significant differences at alpha=0.05?

How to find the letters a, b, ab indicating significant differences using MATLAB at alpha-=0.05? Also, how to write the letters on the plot?

[Rik]

Significance testing should be done on data, not on a plot. And what do you mean exactly with the secoond part of your question?

[Abhishek Chakraborty]

I have understood how to conduct the significance testing using MATLAB. How to place the letters "a", "ab" and "b" on top of the error bars? Any code for that?

[Rik]

You can probably use the text() function. Is that what you mean?

Answer 1

[Vinai Datta Thatiparthi]

Hey Abhishek,

As mentioned by @Rik, use the text function to get the desired outputs.

Here are some links to other discussions on the MATLAB Answers forum that may be of help to you:

• How to label bars in a bar graph
• How to plot numbers on bar graph [Change the array of numbers to an array of characters]

There are many other such discussions on this forum that may guide you.

Hope this helps!