plzzz explain this... i'm new

 regexprep( filecontent, 'R.*$', '', 'dotexceptnewline', 'lineanchors');

[Stephen23]

@bharath gopireddy: you can use my FEX submission makeregexp to experiment with regular expressions. You can download it here:

http://www.mathworks.com/matlabcentral/fileexchange/48930-interactive-regular-expression-maker

It creates a figure that lets you interactively develop and change a regular expression, and shows you all regexp outputs as you type.

Answer 1

[Geoff Hayes]

bharath - see regexp and regexprep. It appears that this line of code is trying to replace text using regexprep, looking for all occurrences of words or phrases (?) beginning with R and replacing with a blank string up to the end of a line (see details on dotexceptnewline and lineanchors).

For example, if

 filecontents = sprintf('Ralph\nRoger\nGeoff\nStaRWars\nCaR\nSpaRtan\nSpartan')

 filecontents =

    Ralph
    Roger
    Geoff
    StaRWars
    CaR
    SpaRtan
    Spartan

then

 regexprep( filecontents, 'R.*$', '', 'dotexceptnewline', 'lineanchors')

 ans =
          <--- empty
          <--- empty
    Geoff
    Sta
    Ca
    Spa
    Spartan

Try some examples on your own, removing the dotexceptnewline and lineanchors to see their effect.

[bharath]

thank you