How to get data from variables that change the name?

I have the variables day1,day2,day3....day15. I want to get the data of each variable within a loop. How I can do it?

Thank you in advance

[Stephen23]

@Kelly Kyriakou: read this carefully:

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

Learn to use indexing rather than make lots of separate variables. Then your life suddenly gets better :)

[Kelly Kyriakou]

Thank you very much. Indeed being a beginner at matlab the idea of indexing is not well-established in my mind.

Answer 1

[John Chilleri]

Hello,

A simple solution would be:

Days = [day1 day2 day3 ... day15];

Then call Days(:,i) for the ith days data if it's a vector (assuming column vectors), or just Days(i) if it's a scalar.

Hope this helps!

Answer 2

[Image Analyst]

The "data of each variable" and the variable itself are one and the same thing. Just assign it to another variable if you want, or just start using it.

someOtherVariable = day1;
someOtherVariable2 = day2 * pi * log(42);
someOtherVariable3 = day5 * cos(day12) + day9;
result = SomeFunction(day7);

and so on. You don't need to do anything special to the variable to access it's "data". The variable and its data are the very same thing.

[Kelly Kyriakou]

Actually, I have many loops to do it manually. I would prefere to use it like "day%d" where the d = 1:15.

[Image Analyst]

See the FAQ for why this is a horrible idea: http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F