how to use getvarname
7 views (last 30 days)
Show older comments
PtnBaseSA2(1,:)={"TEST"}
f="PtnBaseSA2";
f1=genvarname(f)
f1(1)
10 Comments
Stephen23
on 23 Dec 2023
"I have a text in AreaText..."
What is "AREATEXT? That term exist in your text file.
"...the content present in the.txt file"
Which looks very much like an M-file: why not just RUN it?
"Exampe: AreaText: ....xxx....PtnBaseSA2(32)..text...PtnB3(12).."
That is not an example: it is invalid MATLAB sytnax and I cannot run it.
"I catch PtnBaseSA2 and PtnB3 and i display in other AreaText the content present in the.txt file at that index"
If you are just trying to display file content then you definitely do NOT need to dynamically access variable names.
Please upload a sample data file. Please explain which data from that file that you want to display.
Accepted Answer
Matt J
on 22 Dec 2023
Edited: Matt J
on 22 Dec 2023
PtnBaseSA2 is an arraycell with many elements. I find the word "PtnBaseSA2" in some text and display some array indices of this arraycell.
If that's the task, then genvarname has nothing to do with it. In situations like that, you would make your words into struct fields, and use dynamic field indexing, like below. You can also do similar things with tables.
S.PtnBaseSA2={10,20,30,40,50,60}
indices=[2,5];
f="PtnBaseSA2";
S.(f)(indices)
More Answers (2)
Ganesh
on 22 Dec 2023
Edited: Ganesh
on 22 Dec 2023
Firstly, I see that there is an inconsistency between the question and the code you have written. You have asked about the usage of "getvarname" but have mentioned "genvarname" in your code.
Secondly, I assume that when you performed the operation f1(1), you expect the result to be "TEST". This is not bound to happen as you can try viewing the datatype of f1 and you will see it is a string.
Lastly, genvarname is a function that would generate a valid variable name as a string. The reason for using it would be to ensure that new valid variables can be made dynamically. This is usually implemented by using the "eval()" function. However, I advise you to be aware of the risks attached with using the "eval()" function.
Please refer to Example 2 of the following documentation to see how the function is used practically:
2 Comments
Ganesh
on 22 Dec 2023
f="2PtnBaseSA 2"; %Incorrect variable name
f1 = genvarname(f)
eval([f1 + '(1,:)={"TEST"}'])
eval([f1])
Image Analyst
on 22 Dec 2023
I doubt your program requires it, unless you wrote it poorly. The FAQ shows you how to do this unwise operation and tells you why you should not do it: https://matlab.fandom.com/wiki/FAQ#How_can_I_create_variables_A1,_A2,...,_A10_in_a_loop?
0 Comments
See Also
Categories
Find more on Logical in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!