# Math {spam}

### Usage

# 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) ...

### Arguments

- x
- spam object.
- base
- positive number. The base with respect to which logarithms are computed. Defaults to
`e=exp(1)`

.

### Details

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.

### Values

If `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.

### See Also

`Summary.spam`

, `Ops.spam`

and `Math2.spam`

### Examples

Documentation reproduced from package spam, version 1.3-0. License: LGPL-2