R: Prepare a text file for viewing.

viewerDataText {rdataviewer}

R Documentation

Prepare a text file for viewing.

This function derives various important attributes of a text file and stores them so that viewing the file can occur efficiently.

viewerDataText(filename, width = NULL, estimate = NULL, index = FALSE, ...)

`filename`	Name of the file.
`width`	The number of characters on each line to view.
`estimate`	A number of lines of the file to be read to estimate the maximum line length.
`index`	A logical value indicating whether to generate a byte index to the start of each line in the file.
`...`	Arguments passed to the function(s) used to read the file (not currently used).

If both width and estimate are NULL then the maximum line width is determined by reading the entire file.

For large files, setting index=TRUE will vastly speed up the initialisation and viewing of the file.

An object of class "ViewerDataText".

Paul Murrell