f and a pattern to
be matched to its header (first line in the file), the function
returns the matching columns names or indices of the
corresponding data.frame.
grepEcols(f, pattern, ..., n = 1)
getEcols(f, ..., n = 1)character string to be
read in with readLines(f, n = 1).character string containing a regular
expression to be matched to the file's header.strsplit
to split the file header into individual column names.integer specifying which line in file f
to grep (get). Default is 1. Note that this argument must be
named.value, the matching column names of
indices. In case of getEcols, a character of
column names.
f with readLines, then splits it
according to the optional ... arguments (it is important to
correctly specify strsplit's split character vector here)
and then matches pattern to the individual column names using
grep.Similarly, getEcols can be used to explore the column names and
decide for the appropriate pattern value.
These functions are useful to check the parameters to be provided to
readMSnSet2.
readMSnSet2