Asked by Sandeep
on 3 Feb 2013

I have a .dat mesh file which looks something like this

v 0 1 2 3

v 2 4 5

..

Any idea how I can read the file in matlab and find the number of occurrences of a particular string and also the number of integers in a particular row?

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Answer by Image Analyst
on 3 Feb 2013

Edited by Image Analyst
on 3 Feb 2013

Just read it in line by line with fgetl(). Then use strfind() on each line to see if some sequence of numbers you're interested in exists in the string.

fid = fopen('sandeep data.dat);

tline = fgetl(fid); while ischar(tline) disp(tline) tline = fgetl(fid); if strfind(s, '2 4 5') > 0 message = 'Found it'; uiwait(msgbox(message)); end

Sandeep
on 4 Feb 2013

Thanks.. I have another question.. Suppose, I want to extract a certain data by arranging the entire data in the file in an array provided each row has different number of data like

v 1 2 3 4 6

v 1 2 0

v 3 4 9 2..

Also, is there any way to find the number of numbers in each row?

Image Analyst
on 4 Feb 2013

Just count the spaces. The number of spaces equals the number of numbers:

numberOfNumbers = sum(s == ' ')

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## Sandeep (view profile)

Direct link to this comment:http://www.mathworks.com/matlabcentral/answers/62051#comment_126909

Suppose, I want to extract a certain data by arranging the entire data in the file in an array provided each row has different number of data like

v 1 2 3 4 6

v 1 2 0

v 3 4 9 2..

Also, is there any way to find the number of numbers in each row?