Changing save name for text file
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I am having issues about changing the name of a file using the fprintf/fileID function. When I try to input a string in the fileID, I get the "invalid filname" error.
Here is the function:
S=strcat(cd,'\Results\',answer,'.txt');
fileID=fopen(answer,'w');
fprintf(fileID,'%9s %9s\r\n','Fixation','Duration (ms)');
fprintf(fileID,'%10.5f %10.5f\r\n',Sc);
fprintf(fileID,'\r\n %10s\r\n','Total time');
fprintf(fileID,'%10.5f',Tt);
fclose(fileID);
1 件のコメント
Geoff Hayes
2014 年 5 月 27 日
What is answer defined to be? Why define S and then not use it? If I try to run the above with default values for answer, Sc, and Tt then it works fine. Before you try to write to file, the code should check to see if the file identifier is valid:
fileID = fopen(S,'w');
if fileID > 0
% do stuff
% close file
fclose(fileID);
else
fprintf('Error - could not open file %s\n',S);
end
回答 (3 件)
Roberto
2014 年 5 月 27 日
possible causes:
- answer contains invalid charater(s) for a file name
- more or less about the same error but the invalid character comes from CD (most comun error: current folder might contain spaces e.g. c:\my folder\ ).
Possible solutions:
- change the current directory to one with no-spaces in the path like C:\myfolder\
- read some solutions here
Geoff Hayes
2014 年 5 月 27 日
編集済み: Geoff Hayes
2014 年 5 月 27 日
Given your comment as to the return value for answer in Sara's response to your question, I almost think that answer is a cell array rather than a string. Just prior to evaluating
fileID=fopen([answer,'.txt'],'w');
type in the command window
[answer,'.txt']
and
class(answer)
What is returned? If I type the following answer initializations in my command window I see
>> answer = 'Leon'
answer =
Leon
>> answer = {'Leon'}
answer =
'Leon'
The second matches your return value. If it is indeed a cell array, then either replace with the string equivalent OR access the string value via answer{1} as a string must be passed as an input to the fopen function.
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