Find string in txt and delete searched string line

I have a text file.

Example

Bloody, 123456, Rhyme

Fine,6542445,Fate

Faith,9875415,Empty

Faith,45152123,New

I want to search for 'Faith' and i want to delete all Faith lines or i want to search for 'empty' and i want to delete all empty lines.

https://uk.mathworks.com/matlabcentral/answers/3981-string-search-and-delete-in-txt-file

this is good but its delete all info until searched string, not searched string line.

Answer 1

[Bob Thompson]

You can use Jan's method from the linked question to find your lines. Then once you have found them turn them into blank lines (I'm assuming that's also what you mean by 'emtpy'). Once you have found all of the lines, using logic indexing to remove all blanks.

Index = find(strcmp(CStr, SearchedString), 1); % Find lines with 'Faith'
CStr(Index) = []; % Blank found lines
CStr = ~isempty(CStr); % Remove any empty lines, may need ~isempty([CStr(:)]);

[Bloodyrhyme]

Empty is a only word for example. Not situation for txt. i want to find 'empty' as word and i want to delete that line. my mistakes. i tell wrong i guess.

[Bob Thompson]

That's fine. The 'simplest' way to look for multiple words is to run the search multiple times, once for each word, and blank out the respective lines.