Reading flat file with unknown columns
in [Matlab]
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From: Dan Hensley on 28 Sep 2006 14:27 On Thu, 28 Sep 2006 10:33:24 -0700, sunder_79 wrote: > Hi Fort, > > thanks for the response. I haven't used fscanf before but from the > documentation it seemed like I would need to specify the format of the > columns - which is what I'm trying to avoid doing. Is there a way to > read in the file without specifying the format or number of columns. Or > having all the columns default to the same format? If the lines have a specified delimiter, just read in the first line as a string, then parse the line using that delimiter to count the number of columns. Here are a few more functions for you to look at. help fgetl help strread help strtok Dan > > Thanks, > Sunder > > Fort wrote: >> Sunder, >> >> You could just read in the first line (or the whole header) to >> determine the number of columns using an fscanf() and then close the >> file. Compute the number of columns, generate an appropriate format >> string and read it in using textread/textscan or even just fscanf. >> >> --Fort >> >> >> sunder_79(a)yahoo.com wrote: >> > Hi, >> > >> > I have a set of large flat files that I'd like to read in one after the >> > other in a loop. I'm looking for specific columns of data from each >> > file. However the number of columns varies from file to file (and there >> > are lots of them and so it's very timeconsuming to specify the format >> > for each file). Is there a way to read a file in using textread or >> > textscan without specifying the number/format of the columns. If I can >> > do this, then I'd be able to find the appropriate columns that I need >> > by matching the headers. >> > >> > Thanks a lot for your help! >> > Sunder |