separate table data in to sub tables

Question

ALDO 2019-4-19

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https://ww2.mathworks.cn/matlabcentral/answers/457422-separate-table-data-in-to-sub-tables

评论： ALDO 2019-10-10

Hi everyone

I have a table of data the size of 10000x3. There are 300 different names used in the rows. I would like to seperte the variables that have the same name and make a tabel for each variable.

for example if the table below is my original table :

 name       Variable1      variable2       variable3 
  A          variable1_A1    variable2_A2    variable3_A3 
  B          variable1_B1    variable2_B2    variable3_B3 
  K          variable1_K1    variable2_K2    variable3_K3 
  L          variable1_L1    variable2_L2     variable3_L3 
  A          variable1_A4    variable2_A5    variable3_A6 
  A          variable1_A7    variable2_A8    variable3_A9 
  L           variable1_L4    variable2_L5    variable3_L6 

I need to devide it to 4 differnt tables (one for each name):

name       Variable1      variable2       variable3 
  A          variable1_A1    variable2_A2    variable3_A3 
  A          variable1_A4    variable2_A5    variable3_A6 
  A          variable1_A7    variable2_A8    variable3_A9 
  
name       Variable1      variable2       variable3 
  L          variable1_L1    variable2_L2    variable3_L3 
  L          variable1_L4    variable2_L5    variable3_L6 

Thank you in advance for your help!

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Answer 1

Walter Roberson 2019-4-19

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https://ww2.mathworks.cn/matlabcentral/answers/457422-separate-table-data-in-to-sub-tables#answer_371389

编辑：Walter Roberson 2019-4-19

在 MATLAB Online 中打开

G = findgroups(YourTable.name);
output = splitapply(@(varargin) {table(varargin{:}, 'VariableNames', YourTable.Properties.VariableNames)}, YourTable, G);

This should give a cell array of tables.

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Walter Roberson 2019-4-20

I edited the code while you were reading my earlier response.

The c* variable stood in for columns as the documentation implies that the parameters need to be individual variables, but I figured out the way to code around that.

ALDO 2019-4-23

Thank you for taking the time to look over it

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Answer 2

Peter Perkins 2019-5-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/457422-separate-table-data-in-to-sub-tables#answer_373509

ALDO, unless you have a good reason for wanting to do this, I'm gonna suggest that you consider NOT doing it. There are a bunch of functions in MATLAB that are happy to do "grouped" calculations on your original timetable, and you will likely find those easier to use than having to loop over a 300-element cell array of tables.