Update the number of columns needed for my times table

Hello, when I convert my csv file to a timestable, it's saying there are 67 columns when there should be 65 columns. I want to update the Variable Names and its not allowing me to edit the headers in the table without editing all the variables. When I attempt it, i get this error: "Conversion to cell from char is not possible." How do I count the number of columns in a timestable to then be able to delete the excess columns left over at the end of the table so that I can update the variableNames? I'm still fairly new to MATLAB and dealing with an older version so I'm having trouble with this.

[Stephen23]

"How do I count the number of columns in a timestable to then be able to delete the excess columns left over at the end of the table so that I can update the variableNames?"

I doubt that you need to count them:

N = 5; % number of required columns 
T = array2table(randi(9,4,7)) % extra columns

T = 4x7 table
    Var1    Var2    Var3    Var4    Var5    Var6    Var7
    ____    ____    ____    ____    ____    ____    ____

     5       4       8       3       6       9       9  
     1       1       6       4       9       5       8  
     3       5       4       6       7       4       2  
     7       4       1       9       8       7       7  

T(:,N+1:end) = []

T = 4x5 table
    Var1    Var2    Var3    Var4    Var5
    ____    ____    ____    ____    ____

     5       4       8       3       6  
     1       1       6       4       9  
     3       5       4       6       7  
     7       4       1       9       8  

Note that you might lose data.

Answer 1

[Star Strider]

It would heelp to have your .csv file and a description of what you want to do. Also, it might be easiier to do this in a table and then use table2timetable to convert it to a timetable.

If you only want to edit one variable name, that is straightforward —

T1 = array2table(randi(50,5))

T1 = 5x5 table
    Var1    Var2    Var3    Var4    Var5
    ____    ____    ____    ____    ____

     21      40      39      48      40 
     36       3      44      24      25 
      4      14      23      26      23 
     19      26       2      30      37 
     46      20      14      42       9 

T1.Properties.VariableNames{3} = 'Column 3'

T1 = 5x5 table
    Var1    Var2    Column 3    Var4    Var5
    ____    ____    ________    ____    ____

     21      40        39        48      40 
     36       3        44        24      25 
      4      14        23        26      23 
     19      26         2        30      37 
     46      20        14        42       9 

Just choose the one you want to change.

.

[Norma]

Hello, thank you so much! I was using parentheses instead of curly braces.

[Star Strider]

As always, my pleasure!