Matlab TextScan FormatSpec分隔符错误

Question

When reading a large csv file Matlab doesn't recognize ||,|| as a proper delimiter as input argument for textscan. The data is as follows (simplified):

||X||,||Y||,||Z|| (header)
||1||,||2||,||4||
||4||,||4||,||3||

etc.

I use data = textscan(fileID,formatSpec,'Delimiter',','); to read in the data with some format spec '%f %f %f' .

My rubber band solution has been to use 010 editor to replace all '||' with '', making it a proper csv file for matlab, but due to the size of the document (6M lines with approx 35 fields) and the frequency of new documents this is hardly a great solution.

Does anyone know a proper way to import such a file?

Answer 1

You should be able to include it in the format specifier:

data = textscan(fid, '||%f||,||%f||,||%f||', 'headerlines', 1)

and then just leave out the delimiter.

Edit (Following on from comments)

If you are trying to read in strings, the trick is to get it to read in strings without the | character. This is done using %[^|] , like this:

data = textscan(fid, '|| %[^|] ||,|| %[^|] ||,|| %[^|] ||', 'headerlines', 1)