why am i getting this error-Characters adjacent to a ** wildcard must be file separators.

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1. > %%%%% CODE TO EXTRACT TRMM DATA GRID WISE TO GENERATE TIME SERIES OF RAINFALL DEPTH AT 3 HR INTERVAL
2. %%%%% BINDHU V M
3. %TO LOAD ALL THE FILES
4. dirpath=('D:\trmm2\todel\');
5. files=dir('D:\trmm2\todel\3B**');
6. nfiles=length(files);
8. datadir = 'D:\trmm2\todel\';
9. fname = '3B42.20071105.12.7A.SUB.nc';
10. lat1 = ncread([datadir,fname],'latitude');
11. lon1 = ncread([datadir,fname],'longitude');
12. %%%% TO EXTRACT THE DATA FOR INDIVIDUAL GRIDS
13. mydata=[];
14. for i=1:nfiles
15. filename=[dirpath files(i).name];
16. disp(['Processing ',files(i).name]);
17. rain=ncread(filename,'pcp');
18. dd=flipud(rain');
19. c1=reshape(dd',13664,1);
20. mydata=[mydata c1];
21. end
22. data1=mydata';
23. % data1=data*3;
24. %%%% TO GENERATE TEXT FILES WITH TIME SERIES OF rainfall intensitiy GRIDWISE
25. for ii=1:13664
26. textfilename=['precip' num2str(ii) '.txt'];
27. fid1=fopen(textfilename,'wt');
28. fclose(fid1);
29. end
30. for iii=1:13664
31. c=data1(:,iii);
32. precip=c(:,:);
33. textfilename=['precip' num2str(iii) '.txt'];
34. fid1=fopen(textfilename, 'at+');
35. fprintf(fid1, [repmat('%d\t', 1, size(precip,2)) ''],precip');
36. fclose(fid1);
37. end
38. Error using dir
39. Characters adjacent to a wildcard must be file separators.

[Stephen23]

Duplicate:

https://www.mathworks.com/matlabcentral/answers/406570-why-am-i-getting-this-error-error-using-dir-characters-adjacent-to-a-wildcard-must-be-file-sepa

Answer 1

[OCDER]

The error message seems pretty clear. Characters adjacent to a wildcard must be file separators.

files=dir('D:\trmm2\todel\3B**');  %ERROR. You have a "3B" next to "**".

files=dir('D:\trmm2\todel\3B*');   %OK. This will find all folders (not files) starting with 3B

files=dir('D:\trmm2\todel\3B*.*'); %OK. This will find all files in todel folder matching the 3B*.* format