mul {Rsac} | R Documentation

## SOME SIMPLE ARITHMETIC

### Description

These are provided as a matter of convience since any R functions can be easily applied to the vectors of SAC data (see below for examples). These functions apply basic arithmetic functions to each SAC data in a vector. The constant may be the same or different for each SAC file. If less constants are given than files in the vector, then the last constant provided is used for the remainder of the files, to be consistent with the behavior of the original SAC code.

### Usage

    mul(s, c)
    add(s, c)
    pow(s, c)

### Arguments

`s` | an object of class `"rsac"`.
`c` | a constant to be applied to the data.

### Value

same as input.

### Author(s)

Eric M. Thompson <eric.thompson@tufts.edu>

### Examples

    data(srosa)

    getunits(srosa)
    # Convert to m/s
    srosa <- mul(srosa, 1e-9)
    plot(srosa, xlim = c(150, 160))

    # this is also easy to do using the
    # lapply() function
    class(srosa)
    mode(srosa)

    # for all files

    m <- function(X){
           X$x <- X$x * 1e-9
           return(X) }
    srosa <- lapply(X = srosa, m)

    # Or individually:

    srosa[[1]]$x <- abs(srosa[[1]]$x)

[Package Rsac version 0.1-8 Index]