Effacer les filtres
Effacer les filtres

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Fltering to subsets of matrices

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David
David le 4 Mai 2012
Clôturé : MATLAB Answer Bot le 20 Août 2021
both Excel and Sql can 'query' and run functions on subsets of data based on common lable fields (e.g. return all sales in GA)
sum if 'GA' or count if 'GA'
Does Matlab have similare functionality?
  1 commentaire
Sean de Wolski
Sean de Wolski le 4 Mai 2012
Please provide a small example (inputs/ops/expected outputs).

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per isakson
per isakson le 4 Mai 2012
Yes!
sum( MyData( strcmp( MyData( :, ixColumn ), 'GA' ), : ), 1 )
This question is very close to Summing values with database "group by" functionality. It is a better tactic to provide a toy example than repeating the question! Didn't the answers to you other question help you?
  2 commentaires
David
David le 22 Mai 2012
Sorry, but I was not successful using the previous answer and I assumed it was because of the way I framed my question - which is why I tried to improve my question.
per isakson
per isakson le 22 Mai 2012
Does your code work now?

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