Provide a row vector as legend

Hi,

I have a bar graph and I'd like to do a legend assigning the values of each column to a specific number which I have stored in a row vector. Since the values of the vector change, instead of writing these myself inside legend(), I'd like to be able to provide the row vector as an input.

Assuming a is my row vector, I tried doing this: legend(a)

But it didn't work.

What can I do?

Thanks in advance for your help.

Answer 1

[Vedant Shah]

Hi @Pedro Oliveira,

To assign the values of a row vector as a legend, each element must be converted into a string. This can be achieved using the “num2str” function. Additionally, setting 'UniformOutput' to false ensures that the output is returned as a cell array rather than a regular array. For further details, refer to the documentation of the commands:

web(fullfile(docroot, "/matlab/ref/arrayfun.html")) 
web(fullfile(docroot, "/matlab/ref/num2str.html")) 

The following code snippet demonstrates this approach:

a = [10, 20, 30, 40]; 
legend_labels = arrayfun(@num2str, a, 'UniformOutput', false); 
legend(legend_labels); 

Below is the output generated using sample data: