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To Create a Variable with the name of a folder

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Peter
Peter on 2 Jan 2015
Commented: Stephen on 2 Jan 2015
Hello!
I have a variable called this way;
workfolder='C:\Users\Jorge\Desktop\Work_Christmas\Measurements\rpm_measurements\rpm0800\';
And i would like to create another variable and it is the end of the name of my directory (workfolder), in order to use it with a loop, in this case it would be:
new_variable = rpm0800
How could i do it?
Thanks!

Accepted Answer

Stephen
Stephen on 2 Jan 2015
Edited: Stephen on 2 Jan 2015
While the question is rather unclear, it seems that the OP wishes to extract the last directory in the filepath string. This can be achieved using fileparts :
>> [A,B] = fileparts(workfolder(1:end-(workfolder(end)==filesep)))
A = 'C:\Users\Jorge\Desktop\Work_Christmas\Measurements\rpm_measurements'
B = 'rpm0800'
Note first this removes any trailing file separator character using the indexing of the workfolder string. An alternative is to use regexp to locate the last directory in the filepath string:
>> regexp(workfolder,'[^/\\]+(?=[/\\]?$)','once','match')
ans = 'rpm0800'
You should also have a good read of the MATLAB wiki, which covers all of these basic usage questions, with handy examples too:

More Answers (1)

Image Analyst
Image Analyst on 2 Jan 2015
It's usually advised that you don't do that . However there is capability in MATLAB to do it and the FAQ shows some ways, such as using dynamic structure field names.
  4 Comments
Stephen
Stephen on 2 Jan 2015
It is true that Regular Expressions have a rather cryptic syntax and can take a while to master, however they are a powerful tool that can be met in many different programming languages, and thus they are well worth the effort of learning. The fact that regexp is inbuilt means your code remains portable, without relying on any third-party functions (and licences...)
The example that Image Analyst gives above could also be achieved using standard MATLAB regexp:
>> regexp(workfolder,'\w+','match')
ans = {'C','Users','Jorge','Desktop','Work_Christmas','Measurements','rpm_measurements','rpm0800'}
Users wanting to practice and learn about Regular Expressions can try my compact Regular Expression Helper, which opens a figure and uses real-time updating of regexp's inputs and outputs to allow endless experimentation and refining of Regular Expressions:

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