Calling a variable from a variable

e.g With variables:

a b c d

V = who;

Now:

V (2) = b

b(1) = 3000 (for example)

I would like to call variable b using the newly created variable V:

e.g something like [V(2)](1) = 3000

I'm not sure where to start tbh

any help would be great,

thanks in advance,

Matt

Answer 1

[Matt]

Just done it using eval

e.g

a = eval((char(V(1,1)))); >> a (1,1);

thanks for the help guys,

Matt

Answer 2

[Paulo Silva]

assignin('base',char(V(2)),3000)

[Matt]

Thanks, Instead of putting a value into the variable I would like to check the contents.

Answer 3

[Richard]

These kind of situations are best handled by storing the original data in a variable type that is designed to map strings to data. The simplest option is to use a structure which supports indexing with a string variable:

s.a = 1;
s.b = 2;
s.c = 3;
s.d = 4;

V = 'b';
s.(V) = 3000;

In some situations, you might want to look at the containers.Map object.

Answer 4

[Matt Fig]

I don't understand why you would want to do this, but here is a way to automate it.

clear all  % Fresh start...
a = [1 2 3];
b = [4 5 6];
save myvars
N = who;
V = load('myvars')
V.(N{1})(3)  % Returns a(3)