Read .dat file in matlab

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?

[Sandeep]

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?

Answer 1

[Image Analyst]

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]

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]

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

numberOfNumbers = sum(s == ' ')