Read from a text file only characters

I have a text file from which i want only to read chars, spaces and /n, no numbers no other Punctuation marks (. , ' , \ e.c) . How can i do this? Text example Provided by 'example ' . See bottom for copyright. Available online at http://www . bla bla. com

So i want A= "Provided by example\n See bottom for copyrightAvailable online at\n httpwww bla bla com\n

How can i get it?? Thanks in advance

Answer 1

[dpb]

I'd probably just read the whole thing as a string and then remove the offending characters...

Answer 2

[Stephen23]

Reading data and processing data can be thought of as two quite different paradigms. Read the data simply using fileread and then filter it using isstrprop:

str = fileread(filename);
idx = isstrprop(str,'alpha') | isstrprop(str,'wspace');
out = str(idx);

You should read the isstrprop documentation and pick whatever conditions best match your needs.

>> str = sprintf('This is some\ntext with numbers 2015\nand newlines')
str =
This is some
text with numbers 2015
and newlines
>> idx = isstrprop(str,'alpha') | isstrprop(str,'wspace');
>> str(idx)
ans =
This is some
text with numbers 
and newlines

[xaroula mav]

Thanks a lot!!

[Stephen23]

My pleasure. You can also Accept answers that help you to resolve your question: this gives points to the people who volunteer their time to help you :)