Math | R Documentation |
Applies the Math
group functions to spam
objects
# ceiling(x)
# floor(x)
# exp(x, base = exp(1))
# log(x, base = exp(1))
# sqrt(x)
# abs(x)
# cumprod(x)
# cumsum(x)
# cos(x)
# sin(x)
# tan(x)
# acosh(x)
x |
spam object. |
base |
positive number. The base with respect to which logarithms
are computed. Defaults to |
It is important to note that the zero entries do not enter the
evaluation when structurebased=FALSE
. The operations are performed on the stored non-zero
elements. This may lead to differences if compared with the same
operation on a full matrix.
If the option spam.structurebased=TRUE
, all functions operate on the vector x@entries
and return the
result thereof.
Conversely, if structurebased=FALSE
, the result is identical to
one with as.matrix(x)
input and an as.spam
purger.
Reinhard Furrer
Summary.spam
, Ops.spam
and Math2.spam
getGroupMembers("Math")
mat <- matrix(c( 1,2,0,3,0,0,0,4,5),3)
smat <- as.spam( mat)
cos( mat)
cos( smat)
options(spam.structurebased=FALSE)
cos( smat)
sqrt( smat)
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