Z-transforms observations of a time series or centers observations of a time series to the mean.

misc

Functions for applying a wide range of fisheries stock assessment methods.

Gary Nelson

fishmethods

Fishery Science Methods and Models

zt function

<dl> <dt>x</dt>
<dd>vector of observations. Missing values are allowed.</dd> <dt>ctype</dt>
<dd>the type of transformation. 1 = Z transform ((x - mean x)/ sd x); 2 = center (x - mean x). Default = 1</dd></dl>

Arguments

Gary A. Nelson, Massachusetts Division of Marine Fisheries <a href="/link/gary.nelson%40mass.gov?package=fishmethods&version=1.12-1" data-mini-rdoc="fishmethods::gary.nelson@mass.gov">gary.nelson@mass.gov</a>

Author

Z-transform or center a time series — zt

<dl>

 <dt>x</dt>
<dd>vector of observations. Missing values are allowed.</dd>

 <dt>ctype</dt>
<dd>the type of transformation. 1 = Z transform ((x - mean x)/ sd x); 2 = center (x - mean x). Default = 1</dd>

</dl>

Gary A. Nelson, Massachusetts Division of Marine Fisheries <a href='mailto:gary.nelson@mass.gov'>gary.nelson@mass.gov</a>

zt: Z-transform or center a time series

Description

Usage

Value

Arguments

Author

Details

Examples