Converting number to string in a cell data ?

I have a code like that:

data={'class' 'note 1' 'note 2' 'note 3' 'note 4' 'note 5' ;...
      'math' 50 45 68 75 64; ...
      'physics ' 67 54 67 89 90; ...
      'chemistry' 45 76 23 76 89;
      'physics ' 32 45 65 76 93; 
      'math' 54 76 34 54 56};
[row_data column_data] = size(data);
math_finder = 'math';
row_finder = strfind(data, math_finder);
row_number = find(~cellfun('isempty',strfind(data,'math')));
for i = 1:length(row_number)
 classmath_note1(i)=data(row_number(i),2); 
 classmath_note2(i)=data(row_number(i),3);
 classmath_note3(i)=data(row_number(i),4);
 classmath_note4(i)=data(row_number(i),5);
 classmath_note5(i)=data(row_number(i),6);
end

I want to classify math class notes. I mean, at the end, work space should be like that:

Name        -              Value
classmath_note1        = [50 54]
classmath_note2      =  [45 76]
classmath_note3        = [68 34]
classmath_note4       = [75 54]
classmath_note5      =  [64 56]

However, I receive this error:

If any of the input arguments are cell arrays, the first must be a cell array of strings and the second must be a character array.

How can I solve this problem ?

Thank you in advance

Answer 1

[Image Analyst]

Use a table. It would be so much easier than a cell array. http://www.mathworks.com/help/matlab/ref/table.html Let us know if you can't figure it out.

[Ugurcan Ozdemir]

Actually, the issue is that I read the data from xlsx. file, I do not create the data. And when i read the data from excel, I have a data like that.