Looping on one line

I searched the forums and couldn't find anything like this. So either I am doing it completely wrong or there is another method to accomplish it. Here is the code

if true
  % code
SpearMeanRhoAll = vertcat(SpearMeanRhoP2,SpearMeanRhoP3,SpearMeanRhoP4,SpearMeanRhoP5,SpearMeanRhoP6,SpearMeanRhoP7,SpearMeanRhoP8,SpearMeanRhoP9,SpearMeanRhoP10,SpearMeanRhoP11,SpearMeanRhoP12,SpearMeanRhoP13,SpearMeanRhoP14,SpearMeanRhoP15,SpearMeanRhoP16,SpearMeanRhoP17,SpearMeanRhoP18,SpearMeanRhoP19,SpearMeanRhoP20,SpearMeanRhoP21);
end

As you can see the variable "SpearMeanRhoAll" is composed of SpearMeanRhoPx where x goes from 2 to 21. Does anyone know how to loop like this on one line?

Thanks for any help.

[Adam]

How to do what in a loop? Loops are not generally meant to be done in one line other than loop-replacement functions like arrayfun.

In general you should never put yourself in a situation where you have 21 variables with names like that in the first place. Your SpearMeanRhoAll representation would be far better to be used right from the start.

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