Re: [R] help in removal of fixed pattern

A great function for extracting pattern matches is 'm()' library(caroline) vect <- m('([xX][0-9])',df$Input) toupper(vect) #in case you really want all upper case x's It does the hard work of using 'sub' to remove the non-matching parts (sub, grep, regexpr, etc aren't very good for this sort

Re: [R] help in removal of fixed pattern

You can use gsub() to replace parts of strings. Sarah On Saturday, December 3, 2011, arunkumar wrote: > Hi > > I have column name as given below > > If the variable is in log(X1 + 1) pattern it should be removed and i need > only X1 > > Input > log(x1 + 1) > x2 > log(X3 +1) > > Expected Outp

[R] help in removal of fixed pattern

Hi I have column name as given below If the variable is in log(X1 + 1) pattern it should be removed and i need only X1 Input log(x1 + 1) x2 log(X3 +1) Expected Output X1 X2 X3 Please help me -- View this message in context: http://r.789695.n4.nabble.com/help-in-removal-of-fixed-pattern-tp