How to append data inbetween the Array without overwriting its original data ?

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pooja
pooja 2014-3-15
评论： pooja 2014-3-20
Hello,
i am a beginner in matlab ,Sorry if i ask something stupid , but i really need help
i have a array named " train_data " of size 67x103 (having 67 instances and 103 features)
i want to add "two" corrosponding rows to each 67 rows of train_data
for example:
row-1 -->0.45 0.34 0.38 .....
row-2 has to be added as:
row-2 --> log(0.45) log(0.34) log(0.38) ......
row-3 has to be added as:
row-3 --> exp(0.45) exp(0.34) exp(0.38) ......
is it possible to do such thing in "train_data" array without overwriting it ??
Please Help , i tried my best to make my question clear , i am hoping for the answer
Thank You for Consideration !!

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2014-3-15
[n,m]=size(A)
B=permute(reshape([A;log(A);exp(A)]',m,n,3),[2 1 3])
out=reshape(B(:,:)',m,[])'
  2 个评论
pooja
pooja 2014-3-15
编辑：pooja 2014-3-15
Thank you Soooo Much...You saved My life Sir
i exactly needed this code
Now i am trying to understand it :P
pooja
pooja 2014-3-20
hello sir sorry agan
i have 14 class x 67 labels in target
problem : 1st column as it is ,add 2nd and 3rd column having same value as 1st column , reulting dimensions shold be 14 x 201
i tried so many combinations on your given code like
[q,p]=size(train_target);
Y=permute(reshape([train_target;train_target;train_target]',q,p,3),[2 1 3]);
train_target=reshape(Y(:,:)',q,[])';
train_target=transpose(train_target);
but all are disaster .... can you help again please ?

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更多回答（1 个）

Mischa Kim
Mischa Kim 2014-3-15
编辑：Mischa Kim 2014-3-15
Pooja, check out INSERTROWS (description in Jiro's blog) in the File Exchange. If you need to add rows at the top or bottom of an array you can simply use:
C = [A; B]
where you add A on top or B on the bottom of the other array.

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