conditional selection on table

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abdul rehman
abdul rehman 2020-7-15
评论： abdul rehman 2020-7-16
I want the conditional selecton of a row in a table
  1. where name is ali
  2. where name is ali and age is between 25 to 30
  3. where name is ahmed, I want to multply his age with 2
kindly please help

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回答（1 个）

KSSV
KSSV 2020-7-15
编辑：KSSV 2020-7-15
You can access the columns of the table using T.columnname or T.(1), T.(2) etc...
To get the index where name 'Ali' lies, you can use
idx = strcmp(T.name,'Ali') ; % assuming name column to carry names
idx = strcmp(T.(1),'Ali') ; % assuming first column to be names
To get the ages indices.
id = T(idx).age>= 25 & T(idx).age <= 30 ; % assuming age is the column whihc has ages
  1 个评论
abdul rehman
abdul rehman 2020-7-16
Thank, but its not doing the job. Its 2 line you suggested only returning the array of 0s and 1s. I need the whole row of the record where name ali is present. The last code you suggested is producing error
"Subscripting into a table using one subscript (as in t(i)) or three or more subscripts (as in t(i,j,k)) is not supported. Always specify a row subscript and a variable subscript, as in t(rows,vars)."
kindly if you can guide

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