havent been able to find how to search for specific words in a text file anywhere, so here it goes, this is what I have now and just read and prints the entire text file. My Text file contains some words like:
K_G_M_H_NICK_MA,0,7500
P_SA_SWITCH_P_MPE_VL,0,1
If the string begins with 'K' it has to be write 'spec' in the end of the row whatever after K follows. Output has to be then
K_G_M_H_NICK_MA,0,7500 spec
If the string begins with 'P' it has to be write 'test' in the end of the row whatever after P follows. Output has to be then
P_SA_SWITCH_P_MPE_VL,0,1 test
MATLAB does not have this capability unfortunately. You don't have a choice but to read in each line of text, check for what you need then save a new file. You can use fgetl to query a line from a text file. Subsequent calls to fgetl reads the next lines and remembers the last line that you read from. You would use this in conjunction with your standard fopen and fclose to open up and close a file. You will need a reference to an open file with fopen before you use fgetl. Assuming that your file is called text.txt, simply read in the line, check the first character for your condition, then print out what you need at the end of the line should it match. It may be wise to also trim any whitespace before and after your code, so strtrim may be useful for you. Something like this should work, also assuming that you want to write to a new file called text_new.txt:
fid = fopen('text.txt', 'r'); % Open up the file
fidw = fopen('text_new.txt', 'w'); % Open up a new file to write
tline = fgetl(fid); % Get the first line in the text file
while ischar(tline) % As long as this line contains characters (i.e. not end of the file)
% Trim the whitespace
tline = strtrim(tline);
% Check if first character is K or k, then write spec at the end of the line
if tline(1) == 'k' || tline(1) == 'K'
fprintf(fidw, '%s spec\n', tline);
% Check if first character is P or p, then write test at the end of the line
elseif tline(1) == 'p' || tline(1) == 'P'
fprintf(fidw, '%s test\n', tline);
% Write the line as is if no conditions match
else
fprintf(fidw, '%s\n', tline);
end
% Get the next line in the file
tline = fgetl(fid);
end
% Close the files now
fclose(fid);
fclose(fidw);