Error using fscanf Invalid file identifier.

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幸一
幸一 2024-1-10
评论： 幸一 2024-1-17
error at the line 63 of the attached code.
I want to read the data files and make a coupling file. sample data file and the code has been attached to the thread.
Please check and give me an answer for the following error.
The section of the code which is giving the error has been included.
%read files into 3 Dim variable: data
% Dim 1 - station number
% Dim 2 - 1:3 is eta, u, v
% Dim 3 - time steps
for numm = 1:nsta
FILE1 = fopen(sprintf('D:\Mejena_Case\FUNWAVE_Simulation\mejena_tsunami\work\output1\sta_%04d',numm),'r');
data1 = fscanf(FILE1,'%f',[4 Inf]);
sides(numm,:,start1:stop1) = data1([4 3 2],start1:stop1);
fclose(FILE1);
disp(sprintf('File %d has been read...',numm))
end
disp('All files read')
  2 个评论
Stephen23
Stephen23 2024-1-11
编辑：Stephen23 2024-1-11
Ran in:
WARNING:
Both the question and the accepted answer have the same problem: they use escape characters in the SPRINTF format string without considering what effect they have. Depending on which character is escaped, this may either generate a (special) character or give a warning and not return any character, e.g.:
sprintf('\M')
Warning: Escaped character '\M' is not valid. See 'doc sprintf' for supported special characters.
ans = 1×0 empty char array
The robust solution is to NOT place file separator characters in the format string, e.g.:
P = 'D:\Mejena_Case\FUNWAVE_Simulation\mejena_tsunami\work\output1';
F = fullfile(P,sprintf('sta_%04d.txt',7))
F = 'D:\Mejena_Case\FUNWAVE_Simulation\mejena_tsunami\work\output1/sta_0007.txt'
幸一
幸一 2024-1-11
i tried this step and it is not working.
I extremely sorry for disturbing to you all.

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采纳的回答

VINAYAK LUHA
VINAYAK LUHA 2024-1-10
编辑：VINAYAK LUHA 2024-1-11
Change line 62 with
FILE1 = fopen(sprintf('D:\\Mejena_Case\\FUNWAVE_Simulation\\mejena_tsunami\\work\\output1\\sta_%04d.txt',numm),'r');
  18 个评论
显示 16更早的评论
Walter Roberson
Walter Roberson 2024-1-16
The code has
neast = 0;
nwest = 131;
nsouth = 0;
nnorth = 0;
nsta = neast+nwest+nsouth+nnorth;
so nsta is 131
The code has
for numm = 1:nsta
FILE1 = fopen(sprintf('D:\Mejena_Case\FUNWAVE_Simulation\mejena_tsunami\work\output1\sta_%04d',numm),'r');
so the code will try to open up to sta_0131
However, your directory only has up to sta_0048 stored in it.
幸一
幸一 2024-1-17
hello sir.
thank you very much for your kind reply.
I will recheck the code again.

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