How can I declare a char or cell variable using an identifier number?

>> SOLVENT={'S1'}

SOLVENT = 

      'S1'

>> SOLVENT={'S2'}

SOLVENT = 

      'S2'

I want to declare the variable SOLVENT , but I need that the last part of the variable (in this case 1 or 2) be given by a variable n. For example

n=1;
>> eval(['SOLVENT={S' num2str(n) '}'])
??? Error using ==> eval
Undefined function or variable 'S1'.

I need to declare this variable as the first line, but using the variable n as the suffix of the name declared. I also tried bit i had the same result.

>> eval(['S={num2str(S' num2str(n) ')}'])
??? Error using ==> eval
Undefined function or variable 'S1'.

I need to create cell variables using a generic string part (in this case S) and as suffix a variable part n.

Answer 1

[Azzi Abdelmalek]

 n=2
 sprintf('var%d',n)

Answer 2

[Image Analyst]

It's not clear, to me at least, what you want. Why don't you just declare SOLVENT like this:

SOLVENT = {'S1', 'S2'}

If you want to see cells in it, or use them, you can reference them with an index number enclosed in braces:

fprintf('SOLVENT{1} = %s\nSOLVENT{2} = %s\n',...
  SOLVENT{1}, SOLVENT{2});

In the command window:

SOLVENT = 
    'S1'    'S2'
SOLVENT{1} = S1
SOLVENT{2} = S2

One other possibility is that you want to use dynamic field names, but that's getting into some pretty advanced and tricky stuff - not sure if you really want to do that, as there are simpler ways to accomplish things than resorting to that. You can search for that if you want.

Answer 3

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F