Get the numeric value of a variable using sprintf

Hi,

How can I get the numerical value of a variable doing something like this:

num_1=2;
num_2=5;
num=3=9;

random_num=randsample([1 2 3],1)
Time=sprintf('num_%d',random_num)

Then I get Time=num_X but what I want is to get the numerical value associated to num_X

Any clue on how to do it?

Thank you very much.

[Stephen23]

"Any clue on how to do it?"

DO NOT DO THIS!

https://www.mathworks.com/help/matlab/matlab_prog/string-evaluation.html

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Answer 1

[Star Strider]

The only way I can think to do it is to use the ‘evil eval’:

Time - num_2

Time = eval(Time)

Time =
     5

But as Walter wrote, it’s best to avoid it altogether.

Answer 2

[Walter Roberson]

Don't do that.

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