using the "vline" function in a histogram

I'm trying to insert a break point horizontal line in 2 histograms. The line commented out in the script below didn't work. What am I doing wrong in terms of using vline? Thanks.

%   control condition

nbins = 15;

histfit (resultC{13}*100, nbins)

title('Probability Distribution for Control Condition')

xlabel('Percentage Accuracy') 

ylabel('Number of Permutations')

*% h = vline(resultC{3},'g','Classification Accuracy')* 

%   experimental condition

figure()

nbins = 15;

histfit (resultE{13}*100, nbins)

title('Probability Distribution for Experimental Condition')

xlabel('Percentage Accuracy')

ylabel('Number of Permutations')

[Steven Lord]

Define "didn't work." Did it throw an error (and if so, what was the full text of that error message, everything in red?) Did it issue a warning (and if so, everything in orange?) Did it do something else (and if so, explain in more detail?)

Answer 1

[Walter Roberson]

vline() is not a Mathworks-provided function.

You can find vline as part of several File Exchange contributions, including https://www.mathworks.com/matlabcentral/fileexchange/18796-advanced-hline-and-vline