How can I create a variable name from parts of another variable name

Let's say I have 2 vectors called time34578 and disp34578. Now I want to create a new vector vel34578 using displacement and time to compute. But I'm doing this in a script so I want to build the array name vel34578 not physically type it. How?

[Geoff Hayes]

Andy - how does your script "know" about time34578 and disp34578? Does it create them using eval (dangerous) or are these variables loaded from a mat file? Rather than creating multiple variables that are all related (in some fashion), why not just create a single two-dimensional array with the first column corresponding to time, the second to displacement, and the third to velocity? That way you have one variable managing the data for all three properties.

[jgg]

I agree with Geoff. It seems like there should be something generating these vectors that would make this easier.

[Andy Stevenson]

Good point Geoff. I'll take that approach rather that what I was thinking.

Answer 1

[Stephen23]

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 2

[Image Analyst]

The FAQ shows how to do it and explains why you should not do it: http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F