conversion of a dataset array

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Matthew
Matthew 2014-4-22
评论： Andreas Justin 2014-4-23
Hi.
I have the following dataset:
ID SP MD FI
'1234' 'BBB-' 'Baa3' []
'1235' [] [] 'A-'
'1236' 'BB' 'Ba1' 'BB+'
'1237' 'A' 'A3' []
This table was created from a cell to dataset.
Now I know it looks like it but ID is not a string (I think) and I'm trying to do a str2num and this is failing.
Does anyone know how to convert ID into a number?
  1 个评论
Andreas Justin
Andreas Justin 2014-4-22
编辑：Andreas Justin 2014-4-22
str2double?
ds = cell2dataset({'ID';'123';'1234'});
str2double(ds.ID)
ans =
123
1234

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回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-4-22
A={'ID' 'SP' 'MD' 'FI'
'1234' 'BBB-' 'Baa3' []
'1235' [] [] 'A-'
'1236' 'BB' 'Ba1' 'BB+'
'1237' 'A' 'A3' []}
B=cell2dataset(A)
B.ID=str2double(B.ID)
  2 个评论
Matthew
Matthew 2014-4-23
Azzi / Andreas,
Thank you for your help.
I tried your code before and have tried it since you have sent it.
The following error message is produced:
Error using cell2dataset (line 127) NEWNAMES must be a nonempty string or a cell array of nonempty strings.
The 'ID' column is not a string which is causing the issue.
Andreas Justin
Andreas Justin 2014-4-23
could you show us the value of NEWNAMES when this error happens?
and the line of code you're using cell2dataset

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