avrgae and standDev... Data should be vector Problem??

I am trying to plot the average and stand Dev for my lab data, I have like 8 text files (results), I did a loop to get all of them form file directory. Then import these data into matlab to able to work on them to obtain average values and StaDev. into plot.

each text file contains (3 C , 20 R). this the code to get the files form directory

dataDirectory = 'C:\Users\aam\Desktop\noies,';   
allFilesDir = dir(fullfile(dataDirectory , '*.txt'));
allFN = {allFilesDir.name};

for n = 1:length(allFN)

         Mat{n}=importdata(['' num2str(n) '.txt']);   

end

now all files imported in matlab

I am tring to use :

for x=1:3
   A(x)=(Mat{1,n}(1:20,x));

    histfit(A,5)
    xlabel('Noise (rms)');
    ylabel('Sample Number');

    [average,standdev] = normfit(A); % Fit of Distribution

    end

but i got this In an assignment A(I) = B, the number of elements in B and I must be the same.

or data should be vector

    histfit(Mat,5)
    xlabel('Noise (rms)');
    ylabel('Sample Number');

    [average,standdev] = normfit(Mat); % Fit of Distribution

    end

any ideass ???

[Image Analyst]

You forgot to (1) attach your m-file, (2) attach a sample data file, and most importantly (3) give us the actual error message, not some snipped or paraphrased error message but ALL of the red text. As it is, we don't know which line of code caused the error.

[ahmed]

Ok . I have 8 file named as (1:8).txt I am trying to automatize the plotting part using loop but I have a problem concerning using cell..

Answer 1

[Image Analyst]

Why are you passing the entire cell array Mat into histfit()?

[ahmed]

I want to do a loop to get the 'average,standdev' for all data in the text files in this sequence Ex ({1,8}(1:20,3))) ....