Changing variable names based on a string
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Hi all,
I am trying to do some basic imaging processing where I want a script to run through different ROIs on each hemisphere of the brain. Right now I have to run a script manually with each file name (RightPLIC). Is there anyway to code file names with two separate editable strings? i.e. ('hemisphere''ROItarget')
So that I don't have to manually change each line each time I run the code? In linux I typically use {$fname}, but that won't work here...
Thanks in advance for any help!
Below is an example of what I'm talking about. I want to be able to just update "right" or "M1" or "PLIC" more quickly.
% files needed to do pde tracking seedfile = [dirname, 'RightPLIC']; % seed targetfile = [dirname, 'RightM1_ACPC_DTI_space']; % target
maskfile = [dirname, 'dti.moco.bet '];
sidemaskfile = [dirname, 'right_mask']; % this will be combined with anatomical mask
% name of output file: nifti
outputfile = 'RightM1_ACPC.count';
File = 'RightM1_ACPC.count.nii.gz';
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Nathan
am 13 Aug. 2014
Bearbeitet: Nathan
am 13 Aug. 2014
Kelsey,
You could have a conditional block at the top of your code and you could change the value of say n and switch the value of the a string based on this.
n=1;
if n==1,
String1 = 'Right';
String2 = 'M1';
elseif n==2,
String = 'option2';
elseif n==3,
String = 'option3';
else
Error('Selection is not a valid option');
end
Then you can change your code in some form like:
% name of output file: nifti
outputfile = strcat(String1, String2, '_', 'ACPC.count');
File = strcat(String1, String2, '_', 'ACPC.count.nii.gz');
This method works great, just not sure if I percived exactly what parts needed to be dynamicallly changible. Let me know if you have any questions about this method.
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Joseph Cheng
am 13 Aug. 2014
Sightly confused on what you're trying to do but here is my attempt.
STR = 'Right'; %or M1 or PLIC
% files needed to do pde tracking
seedfile = [dirname, STR, 'PLIC']; % seed
targetfile = [dirname, STR, 'M1_ACPC_DTI_space']; % target
maskfile = [dirname, 'dti.moco.bet '];
sidemaskfile = [dirname, STR, '_mask']; % this will be combined with anatomical mask
% name of output file: nifti
outputfile = [STR, 'M1_ACPC.count'];
File = [STR, 'M1_ACPC.count.nii.gz';
Since these are all String arrays you can concatenate them with each other like you were already doing. Since i couldn't figure out based on your example of the target file and output file having RightM1 i left it in there. you could possibly edit this with a switch/case statement so depending on what the edit string is you can get two string substitution variables to make 'RightM1' instead of just right.
%air coding so pardon any errors
type = 'Right'
switch type
case 'right'
STR1 = 'Right'
STR2 = 'RightM1'
case 'M1'
STR1 = _)___
STR2=_____
case 'PLIC'
end
same stuff above but use STR1 or STR2 depending on which one fits.
Additionally if your files are named in a particular way you could write this to do it automatically and detect which strings to update.
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