How to define a text variable using an older text variable?
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Martín Pérez Estébanez
on 24 Mar 2022
Commented: Stephen23
on 24 Mar 2022
Hi, I have a bunch of csv files that I would like to import into my MATLAB. The files share a common part of the name, but contains some variations. To make it easy, I would like to make a set of names for the variables that I want to import, but I am not sure how to do it.
I will give you an example. Giving the following variable "n", how can I generate a set of "mi" string variables based in "n" like in the example?
n="batch1"
m1="batch1_1"
m2="batch1_2"
.
.
mi="batch1_i"
Thank you very much!
1 Comment
Stephen23
on 24 Mar 2022
Edited: Stephen23
on 24 Mar 2022
"To make it easy, I would like to make a set of names for the variables that I want to import,..."
It is the opposite of easy.
Naming the variables dynamically would be slow, complex, inefficient, obfsucated, liable to bugs, and difficult to debug:
"...but I am not sure how to do it."
Don't do it.
"Giving the following variable "n", how can I generate a set of "mi" string variables based in "n" like in the example"
MATLAB is designed to use arrays. You should use arrays, with indexing. Indexing is neat, simple, and very efficient (unlike what you are trying to do). Using indexing is what the MATLAB documentation shows here:
Accepted Answer
Voss
on 24 Mar 2022
This will create a set of numbered variable names based on n. You can use the resulting m as your list of variable names.
(There are two different approaches depending on if n is a string or a character vector - it's a string in the question, like you said.)
n = "batch1"; % string n
m = string(sprintfc(n+"_%d",1:10).') % string array m
n = 'batch1'; % in case you had a character vector n
m = sprintfc([n '_%d'],1:10).' % cell array of character vectors m
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