How to change y axis units from decimal to % in probability plots (function: probplot) or Weibull plots (function: wblplot)?

When drawing probability plots using "probplot" or "wblplot", how do you get the y axis to be displayed in % instead of decimals? Thanks!

Answer 1

[Gautam]

To display the y axis labels as percentages for “probplot” or “wbplot”, you can modify the y-axis tick labels using MATLAB's axis manipulation functions.

Specifically, you can use the functions “yticks” and “yticklabels” functions to change the y-axis labels from decimals to percentages.

The code below changes the y-axis labels to percentages to get the corresponding output

data = randn(1000, 1); % Generate random data 

probplot('normal', data); % Create a normal probability plot 
yt = yticks; % Get the current y-axis ticks 
yticklabels(arrayfun(@(y) sprintf('%.0f%%', y * 100), yt, 'UniformOutput', false)); % Convert y-axis tick labels from decimals to percentages 
 
% Add labels and title 
xlabel('Data'); 
ylabel('Probability (%)'); 

You can refer to the following documents for more information on the axis functions

1. “yticks”: https://www.mathworks.com/help/matlab/ref/yticks.html

2. “yticklabels”: https://www.mathworks.com/help/matlab/ref/yticklabels.html