MATLAB: How to read data from a file and skip the empty lines and text lines and store those data in a matrix

file

 Given data as transmission_data.txt
How can I read data from this file and skip the empty lines and text lines and store the data in a matrix ?

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http://www.mathworks.com/matlabcentral/answers/284162#answer_222097

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MATLAB: Fgetl skipping empty lines and text lines

No looping needed...as long as the numeric values are regular (ie, same number of columns each record) as shown.

>> c=textread('alex.dat','%s','delimiter','\n','whitespace','')  % sample file
c = 
    '1 1 -1 1 1 -1'
    '1 -1 1 1 -1 1'
    ''
    'sdasr'
    '-1 1 1 1 -1 -1 '
>> A=str2num(char(c(~cellfun(@(x) all(isletter(x)),c))))
A =
     1     1    -1     1     1    -1
     1    -1     1     1    -1     1
    -1     1     1     1    -1    -1
>>

ADDENDUM

Above will fail if the string happens to have any digits in it; more robust would be two steps; first remove blank lines and then use any instead of all for the alpha test.

isstrprop might turn out useful here, too...

ADDENDUM 2 :)

IF were going to use a loop and fgetl here, I'd do it more like--

A=[];  % allocate accumulator array
while ~feof(fid)
  try
    A=[A;str2num(fgetl(fid))];
  catch
  end
end

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MATLAB: Fgetl skipping empty lines and text lines

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