I cannot get my string to print

The problem asks to Printing out the means of each column from an excel data sheet. I have gotten the means to print the way I want but were to assign them to the name of the column from "strColumns"

This is my script so far

dataN = csvread('DataClass.csv');
strColumns = {'LabQuiz'; 'zyBooks'; ...
              'Labs'; 'Homeworks'; ...
              'MidtermI'; 'MidtermII'; 'Final'; ...
              'ExamAverage';'Grade'};

% Line styles
strLineStyles = {'--b', ':b', '-k', '--k', ':g', '--g', '.g', '-g', '-r'}; 

for colData=dataN(:,(1:9)) %index variable

      m=mean(colData);

      fprintf('The average of %s is %0.2f\n', strColumns{1:9},m)

end

I've tried a million different ways and I can't make it work. It should print like

The average of LabQuiz is 82.44
The average of zyBooks is 135.62
The average of Labs is 93.10
The average of Homeworks is 91.19
The average of MidtermI is 80.01
The average of MidtermII is 75.19
The average of Final is 65.56
The average of Exam Average is 73.59
The average of Grade is 86.64

Answer 1

[Walter Roberson]

dataN = csvread('DataClass.csv');
strColumns = {'LabQuiz'; 'zyBooks'; ...
              'Labs'; 'Homeworks'; ...
              'MidtermI'; 'MidtermII'; 'Final'; ...
              'ExamAverage';'Grade'};

% Line styles
strLineStyles = {'--b', ':b', '-k', '--k', ':g', '--g', '.g', '-g', '-r'}; 

for colidx = 1 : 9
  colData = dataN(:,colidx) %index variable
  m = mean(colData);
  fprintf('The average of %s is %0.2f\n', strColumns{colidx}, m)
end

[Jacqueline Raab]

Thank you!!! I've spent HOURS trying to figure this out