capture.and.write {sfsmisc} | R Documentation |
Capture output and Write / Print First and Last Parts
Description
Capture output and print first and last parts, eliding
middle parts. Particularly useful for teaching purposes, and, e.g.,
in Sweave (RweaveLatex
).
By default, when middle = NA
, capture.output(EXPR, first, last)
basically does
co <- capture.output(EXPR) writeLines(head(co, first)) cat( ... dotdots ...) writeLines(tail(co, last))
Usage
capture.and.write(EXPR, first, last = 2, middle = NA,
i.middle, dotdots = " ....... ", n.dots = 2)
Arguments
EXPR |
the (literal) expression the output of which is to be captured. |
first |
integer: how many lines should be printed at beginning. |
last |
integer: how many lines should be printed at the end. |
middle |
numeric (or NA logical): |
i.middle |
index start of middle part |
dotdots |
string to be used for elided lines |
n.dots |
number of |
Value
return value of capture.output(EXPR)
.
Author(s)
Martin Maechler, ETH Zurich
See Also
Examples
x <- seq(0, 10, by = .1)
## for matrix, dataframe, .. first lines include a header line:
capture.and.write( cbind(x, log1p(exp(x))), first = 5)
## first, *middle* and last :
capture.and.write( cbind(x, x^2, x^3), first = 4, middle = 3, n.dots= 1)
[Package sfsmisc version 1.1-18 Index]