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

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 !!

Answer 1

[Azzi Abdelmalek]

[n,m]=size(A)
B=permute(reshape([A;log(A);exp(A)]',m,n,3),[2 1 3])
out=reshape(B(:,:)',m,[])'

[pooja]

Thank you Soooo Much...You saved My life Sir

i exactly needed this code

Now i am trying to understand it :P

[pooja]

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 ?

Answer 2

[Mischa Kim]

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.

[pooja]

Thank you so much for replying :)