How to split tables and extract all data based on a column value?

Hi all. I'm new to MATLAB and coding in general. I'm practicing on this data set (r_T.mat).

I want to create separate tables based on values on column 'G'. These tables need to include all data (from column 'custNo' up to column 'p').

So the output should be 3 separate tables with all data still intact.

I can't seem to separate them will all data still intact. When I apply

r_T.G(r_T.G == 1)

it just outputs

ans =

     1
     1
     1
     1
     1

and it does NOT extract ALL data from column 'custNo' up to column 'p' in a separate table.

To provide more context, my end goal is to run a while loop to get the sum of column 'd' up until <= a variable 'C' for each group in column 'G'.

Any help or tips is greatly appreciated. Thank you.

Answer 1

[Cris LaPierre]

See this page on how to access data in a table.

You are close. Don't forget to include both row and column indices, and make the outer variable the data you want to extract. In this case, that is probably the table name only.

load r_T.mat
r_T(r_T.G == 1,:)

ans = 5x8 table
    custNo    x_coor    y_coor    d     nearest_dist    m    G      p   
    ______    ______    ______    __    ____________    _    _    ______

      1         13         6      15        11.18       2    1    1.3416
      2         18        16      30            0       2    1       100
      3         13         6      15        11.18       2    1    1.3416
      6         16         9      13       7.2801       2    1    1.7857
      7         14        17      20       4.1231       2    1    4.8507

Of course, if it's just the sum you ultimately want, try using groupsummary.

sumTbl = groupsummary(r_T,'G','sum','d')

sumTbl = 3x3 table
    G    GroupCount    sum_d
    _    __________    _____

    1        5          93  
    2        1          30  
    3        4          68  

[Christoper Angelo Malayan]

Thank you for this!