MATLAB: Dynamic variable names for MATLAB table

MATLAB

I am making the header names of the table as following:
colnames = [arrayfun(@(x) sprintf('type%d', x), 1:size(all_sorted), 'UniformOutput', false) arrayfun(@(x) sprintf('binary%d', x), 1:size(all_sorted), 'UniformOutput', false) 'result']
a_table = table(result_matrix, 'VariableNames',cell2mat(strcat({str2mat(colnames)})))
But always the last command gives error about 
Error using table (line 259)
Invalid parameter name. Parameter name must be a nonempty string or character vector.
I tried a few permutations and combinations of converting the colnames to string, cell2mat, etc. But they give some or the other error. How can I specify the colnames with the above commands or with any of your other suggestions?

Best Answer

  • Use array2table instead of table (the wrong function, unless you really want the array in one variable).
  • Get rid of all of that cell2mat and strcat and str2mat confusion (what are you concatenating? Nothing).
all_sorted = [2;3;5];
result_matrix = randi(5,7)
result_matrix = 7×7
     5     1     1     1     1     2     2
     2     2     4     1     4     5     1
     5     5     2     4     5     3     3
     2     1     5     4     4     2     4
     3     3     2     5     1     4     5
     3     5     4     3     1     3     3
     4     3     4     5     5     2     2

●
nr = size(all_sorted,1);
C1 = arrayfun(@(x) sprintf('type%d', x), 1:nr, 'UniformOutput', false)
C1 = 1x3 cell array
    {'type1'}    {'type2'}    {'type3'}

C2 = arrayfun(@(x) sprintf('binary%d', x), 1:nr, 'UniformOutput', false)
C2 = 1x3 cell array
    {'binary1'}    {'binary2'}    {'binary3'}

VN = [C1,C2,{'result'}];
T = array2table(result_matrix, 'VariableNames',VN)
T = 7x7 table
    type1    type2    type3    binary1    binary2    binary3    result
    _____    _____    _____    _______    _______    _______    ______

      5        1        1         1          1          2         2   
      2        2        4         1          4          5         1   
      5        5        2         4          5          3         3   
      2        1        5         4          4          2         4   
      3        3        2         5          1          4         5   
      3        5        4         3          1          3         3   
      4        3        4         5          5          2         2
Related Question