# 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. 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. For example, the cosine of sparse matrix is a (full) matrix with many ones.

Evaluating function resulting in NA/NaN/Inf is possible but the result cannot be used further as NA/NaN/Inf are not meaningful (yet).

### Values

All functions operate on the vector `x@entries`

and return the result thereof.

### See Also

### Examples

Documentation reproduced from package spam, version 0.40-0. License: GPL | file LICENSE