Aggregation on Matlab Table
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I have below table in matlab an i want to aggregate this table based on column name ,
name nums
'es' '1,2,3'
'mo' '4,3,1'
'al' '2,3,1'
'es' '40,2,8'
'es' '1,2,5'
'mo' '5,2,1'
'ta' '9,4,2'
'al' '2,6,1'
...
and this my desired output:
name nums
'es' '1,2,3,8,40,5'
'mo' '4,3,1,5,2'
'al' '2,3,1,6'
'ta' '9,4,2'
...
and this is my code,
n,m = size(T);
for i = 1:n
if ~ismember(name,mynewtab)
mynewtab.input(i).nums = mynewtab.input(i).nums + nums;
else
mynewtab.input(i).nums = mynewtab.input(i).nums + nums;
mynewtab.input(i).name = name;
end
end
but this code has some errors.
3 comentarios
madhan ravi
el 29 de Oct. de 2018
by the how did you create a table with duplicate row name , curious..
Stephan
el 29 de Oct. de 2018
I think this are not row names, but entries in the column named 'name'.
esmaeil zahedi
el 29 de Oct. de 2018
Respuestas (1)
Peter Perkins
el 31 de Oct. de 2018
0 votos
I doubt that what you showed is actually what you want.
I imagine what you want is a table (the datatype) with a categorical variable Name, and a cell variable Nums, each cell of which contains a numeric vector of different lengths. From there; it's a one-liner: call varfun with @(x) unique([x{:}],'stable') as the function.
If Nums in your table is a cell array containing numeric row vectors, that function will receive a smaller cell array, all the cells corresponding to, say, ES, concatenate all the contained row vectors, and return just the unique numbers.
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