Text file modification (remove blank line)

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Lunatix
Lunatix 2016-5-17
评论： Lunatix 2016-5-17
I've a text file like this:
[TITLE]
-> blank line (I want remove) <-
[JUNCTIONS]
;ID Elev Demand Pattern
1 60 4 ;
2 40 4 ;
3 20 2 ;
4 40 0 ;
-> blank line (I want remove) <-
[RESERVOIRS]
;ID Head Pattern
5 100 ;
-> blank line (I want remove) <-
[TANKS]
;ID Elevation InitLevel MinLevel MaxLevel Diameter MinVol
-> blank line (I want remove) <-
[PIPES]
;ID Node1 Node2 Length Diameter Roughness
I have to remove blank line. Can someone help me?

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采纳的回答

Walter Roberson
Walter Roberson 2016-5-17
filecontent = fileread('YourFile.txt');
newcontent = regexprep(filecontent, '\n\n+', '\n');
fid = fopen('NewFile.txt', 'w');
fwrite(fid, newcontent);
fclose(fid);
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Walter Roberson
Walter Roberson 2016-5-17
filecontent = fileread('pressure.txt');
newcontent = regexprep(filecontent, {'\r', '\n\n+', '\n'}, {'', '\n', '\r\n'});
fid = fopen('new_pressure.txt', 'w');
fwrite(fid, newcontent);
fclose(fid);
Your original file is in dos format, using carriage return linefeed for the line terminator. The above code retains that. If you want it changed to just linefeed then use
newcontent = regexprep(filecontent, {'\r', '\n\n+'}, {'', '\n'});

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