rename single .txt file with changing seed number

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I've created a GUI with App Designer. It's basic, four drop down menus with descriptors, and a single button that renames a .txt file
The file i'm trying to rename is spit out by a data aquisition software that names the file with a prefix and a seed number. For example:
"NewTest00001.txt", then the next save spits out "NewTest00002.txt", ecetera.
The code i've written within the ButtonPushed function is as follows:
movefile(NewTest, strcat('C:\Users\PC\Desktop\TestData\Renamed\',...
Which works when the file name matches, the problem is that the seed changes after every save. I've tried changing the code to
But that creates a new folder within the "Renamed" folder due to the * which interprets it as a folder instead of a text file.
There's got to be a simple solution i'm unaware of where the code reads in the text file like "<NewTest><LiterallyAnyNumber>.txt" and renames it.
Essentially I run test, save test as "NewTest#####.txt", Press the rename button in my GUI, repeat.

Accepted Answer

Chris on 22 Sep 2022
Edited: Chris on 22 Sep 2022
Do you know the seed?
testSeed = 454;
NewTest = strcat('C:\Users\PC\Desktop\TestData', num2str(testSeed), '.txt')
NewTest = 'C:\Users\PC\Desktop\TestData454.txt'
If you want the same number of digits in the seed each time:
testStr = sprintf('%05d',testSeed);
NewerTest = strcat('C:\Users\PC\Desktop\TestData', testStr, '.txt')
NewerTest = 'C:\Users\PC\Desktop\TestData00454.txt'
Chris on 23 Sep 2022
@Garrett Craig Porter looks good, but I'm not sure the first four lines are doing anything.
They get the values in the dropdown menus, but they don't assign the values anywhere, nor print them to the display due to the presence of the semicolons. The code should run fine without those lines, I think.

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