fill part of vector

 I have a=[1 2 5 4 2 7 4 8 2 3](10 values),b=[0 1 2 3],I want to fill a so that
 a=[0 1 2 3 0 0 0 0 0 0],

Answer 1

[dpb]

There's nothing left so there's no point in doing anything except sotoo--

a=0; a(1:length(b))=b;

a=[b zeros(1,length(a)-length(b)];

An essentially innumerable ways to get there, choose one and go on.

[yousef Yousef]

It is not working

[dpb]

so fix the typo of I forgot that '0' is a scaler and won't fill...

a=zeros(size(a)); a(1:length(b)=b;

surely that's not too tough.

[yousef Yousef]

its perfect.Thanks a lot

Answer 2

[yousef Yousef]

assume I have d=[1 3 5 6 7 8 1 4 5 10],e=zeros(5,10),I want to take only the first 4 elements of d and fit them to the first row of e

[dpb]

Basically the same thing--just use colon operator to address the elements of concern ensuring the LHS and RHS have same length of subscripting.

All of these kinds of operations are in the "Getting Started" section of the documentation under array addressing. I suggest working thru those early sections and the exercises/examples therein to get the basics down.