How to set multiple values at the same time from a vector?

There is a vector v = [1,2,3], and I want to set a=1, b=2, c=3 in a compact form. I tried [a,b,c] = deal(v), but it is not working, because the result is a = [1,2,3]. deal(1,2,3) is ok, but I dont know how to make 1,2,3 from [1,2,3]. In Maple od(v) makes this. Is there any solution for this in MATLAB?

Answer 1

[Manoj]

This is one way I could think of , but maybe there is an easier way

v=[1,2,3];
vv=num2cell(v);
[a,b,c]=deal(vv{:});

[Guillaume]

You actually don't need the deal in this case:

[a,b,c] = vv{:};

[Mr M.]

I hope there is a fast solution without cell array, which is often used to deal with mixed type of data (usually strings).

[Guillaume]

Cell arrays are used for all sort of things. One of its use is conversion to comma separated lists as shown here and as used by varargout and varargin

I'm not sure why you're talking about fast. The operation is instantaneous.

Answer to the question mistakenly asked in another answer: It is not possible to write it into one line somehow? num2cell(v){:}

No that is not possible. You can't index into the return value of a function in matlab. You always have to store that return value in a variable. There is no way around that.

[Mr M.]

The getfield function is a solution, isn't it?

[Guillaume]

I don't see what getfield has got to do with the subject at hand.

[Mr M.]

OK, thanks: [a,b,c]=deal(vv{:}); is a solution. But what if I don't know the number of parameters? For example the maximum is three (a,b,c) but v maybe contains only two, and I want to set c to a default value in this case. How to solve this problem?

[Guillaume]

As I said, you don't need the deal,

[a,b,c] = vv{:};

works just as well.

As for your other question, please start a new question so that whoever answers it can get the credits for it.