mean function gives an error but not median

I am trying to calculate mean, median and 90% percentile of arrays. Median and prctile work fine but mean gives an error message:

Array indices must be positive integers or logical values.

Teh error comes from Averted_Deaths_Array(ij,1) = mean(Averted_Deaths(ij,:)); in the following code.

The code is simple.

TotalDeathsArray = rand(12,2500);
% Calculate Averted cases
for i=1:2500
    %2: PCV13 1+1, 3: PCV15 2+1, 4: PCV15 1+1
    % 1+1
    Averted_Deaths(1,i) = TotalDeathsArray(2,i) - TotalDeathsArray(4,i);
    Averted_Deaths(2,i) = TotalDeathsArray(6,i) - TotalDeathsArray(8,i);
    Averted_Deaths(3,i) = TotalDeathsArray(10,i) - TotalDeathsArray(12,i);
    % 2+1        
    Averted_Deaths(4,i) = TotalDeathsArray(2,i) - TotalDeathsArray(3,i);        
    Averted_Deaths(5,i) = TotalDeathsArray(6,i) - TotalDeathsArray(7,i);
    Averted_Deaths(6,i) = TotalDeathsArray(10,i) - TotalDeathsArray(11,i);
end
Averted_Deaths_Array = zeros(6,3);
for ij=1:6      % Averted QALY
    %Averted QALY when changing with New 1+1
    Averted_Deaths_Array(ij,1) = mean(Averted_Deaths(ij,:));
    Averted_Deaths_Array(ij,2) = median(Averted_Deaths(ij,:));
    Averted_Deaths_Array(ij,3) = prctile(Averted_Deaths(ij,:),90);
    
end

[Torsten]

Works for me (see above).

Maybe you use a variable named "mean" or you have a file named "mean.m" in your working directory. If so, rename the variable/file.

[Yoon]

Thank you!. When I loaded a mat file, there was an array called 'mean'. It works now.

Answer 1

[Star Strider]

That you are getting theee error:

Array indices must be positive integers or logical values.

indicates that somewhere in your code you have a variable named ‘mean’. You need to name it something different that makes sense in the context you are using it.

Run thiis in your Command Window or a script:

which mean -all

to confirm that. If that is true, the first entry in the results should be somethiing like:

mean is a variiable.

.

[Yoon]

Thank you!. When I loaded a mat file, there was an array called 'mean'. It works now.

[Star Strider]

As always, my pleasure!