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How to remove a slash from fullfile?

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Wesser
Wesser on 12 Sep 2022
Commented: Hiro Yoshino on 13 Sep 2022
I want the file path for wtf to read: 'C:\Users\jessi\Desktop\HydrusMC\Simulations\MC_1\Obs_Node.out'
but with the code as scripted below renders:
'C:\Users\jessi\Desktop\HydrusMC\Simulations\MC_\1\Obs_Node.out'
How do I drop the \ between the MC_ and the 1? I couldn't find any advise from other posts on this aspect of fullfile.
wtf= fullfile('C:\\','Users','jessi','Desktop','HydrusMC','Simulations','MC_',num2str(i),'Obs_Node.out');
  1 Comment
Stephen23
Stephen23 on 12 Sep 2022
This has nothing to do with FULLFILE, you can simply concatenate them together:
['MC_',num2str(i)]
or use a string:
"MC_"+i

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Answers (2)

Hiro Yoshino
Hiro Yoshino on 12 Sep 2022
How about this?
wtf= fullfile('C:\\','Users','jessi','Desktop','HydrusMC','Simulations',("MC_"+num2str(1)),'Obs_Node.out')
wtf = "C:\\/Users/jessi/Desktop/HydrusMC/Simulations/MC_1/Obs_Node.out"
  2 Comments
Wesser
Wesser on 12 Sep 2022
Worked! Thanks!
If it's ok to pile on a follow up questions....
I am getting the error:
Error using fgets
Invalid file identifier. Use fopen to generate a valid file identifier.
Error in fgetl (line 32)
[tline,lt] = fgets(fid);
Error in Concentration (line 14)
x=fgetl(Node_conc);
in the below code. I posed this question yesterday and thought that resolving the file path issue would make the error go away, but it didn't. Any suggestions?Malab doesn't seem to like me using fgetl.... but why?
num_sim=1000; % Number of Monte Carlo Simulations
Node_CONC=zeros(57759,num_sim); %preallocation for output from all monte carlos
path=cell(1,num_sim);
for i=1:num_sim
wtf= fullfile('C:\\','Users','jessi','Desktop','HydrusMC','Simulations',("MC_"+num2str(i)),'Obs_Node.out');
Node_conc = fopen('wtf','r'); % Open monte carlo output file in Path (i)
skip_lines=11; %skip all the lines until the actually output data
for k=1:(skip_lines)
x=fgetl(Node_conc);
end
temp = fscanf(Node_conc,'%f',[5,57759]); %scan the matrix of data
TEMP = temp'; % transpose data
temp_Conc = TEMP(:,5); % select the 5th column (concentration)
Node_CONC(:,i) = temp_Conc(:); % save the concentration a new file, one column per iteration of loop
fclose(Node_conc);
end
%Node_CONC(:,1)=temp(:,2)
Hiro Yoshino
Hiro Yoshino on 13 Sep 2022
wtf= fullfile('C:\\','Users','jessi','Desktop','HydrusMC','Simulations',("MC_"+num2str(i)),'Obs_Node.out');
Node_conc = fopen('wtf','r'); % Open monte carlo output file in Path (i)
You should pass the content of "wtf" to the function fopen.
In this case, you are passing the character array of 'wtf'.
You can tell the difference by checking out these as follows:
'wtf'
ans = 'wtf'
wtf= fullfile('C:\\','Users','jessi','Desktop','HydrusMC','Simulations',("MC_"+num2str(i)),'Obs_Node.out')
wtf = "C:\\/Users/jessi/Desktop/HydrusMC/Simulations/MC_0+1i/Obs_Node.out"

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Voss
Voss on 12 Sep 2022
Combine the 'MC_' and the i into a single argument.
Like this:
wtf= fullfile('C:\','Users','jessi','Desktop','HydrusMC','Simulations',['MC_' num2str(i)],'Obs_Node.out');
Or this:
wtf= fullfile('C:\','Users','jessi','Desktop','HydrusMC','Simulations',sprintf('MC_%d',i),'Obs_Node.out');
  1 Comment
Wesser
Wesser on 12 Sep 2022
Thank you. These worked as well as the method suggested above.

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