| sweep {base} | R Documentation |
Return an array obtained from an input array by sweeping out a summary statistic.
sweep(x, MARGIN, STATS, FUN="-", ...)
x |
an array. |
MARGIN |
a vector of indices giving the extents of x
which correspond to STATS. |
STATS |
the summary statistic which is to be swept out. |
FUN |
the function to be used to carry out the sweep. In the
case of binary operators such as "/" etc., the function name
must backquoted or quoted. (FUN is found by a call to
match.fun.) |
... |
optional arguments to FUN. |
An array with the same shape as x, but with the summary
statistics swept out.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
apply on which sweep used to be based;
scale for centering and scaling.
require(stats) # for median med.att <- apply(attitude, 2, median) sweep(data.matrix(attitude), 2, med.att)# subtract the column medians