prep.homogenize.log: Logarithmic transformation

In predtoolsTS: Time Series Prediction Tools

Description

Performs a logarithmic transformation to a time serie.

Usage

prep.homogenize.log(tserie)

Arguments

tserie

a ts object

Value

ts object with transformed time serie

Examples

prep.homogenize.log(AirPassengers)

Example output

          Jan      Feb      Mar      Apr      May      Jun      Jul      Aug
1949 4.718499 4.770685 4.882802 4.859812 4.795791 4.905275 4.997212 4.997212
1950 4.744932 4.836282 4.948760 4.905275 4.828314 5.003946 5.135798 5.135798
1951 4.976734 5.010635 5.181784 5.093750 5.147494 5.181784 5.293305 5.293305
1952 5.141664 5.192957 5.262690 5.198497 5.209486 5.384495 5.438079 5.488938
1953 5.278115 5.278115 5.463832 5.459586 5.433722 5.493061 5.575949 5.605802
1954 5.318120 5.236442 5.459586 5.424950 5.455321 5.575949 5.710427 5.680173
1955 5.488938 5.451038 5.587249 5.594711 5.598422 5.752573 5.897154 5.849325
1956 5.648974 5.624018 5.758902 5.746203 5.762051 5.924256 6.023448 6.003887
1957 5.752573 5.707110 5.874931 5.852202 5.872118 6.045005 6.142037 6.146329
1958 5.828946 5.762051 5.891644 5.852202 5.894403 6.075346 6.196444 6.224558
1959 5.886104 5.834811 6.006353 5.981414 6.040255 6.156979 6.306275 6.326149
1960 6.033086 5.968708 6.037871 6.133398 6.156979 6.282267 6.432940 6.406880
          Sep      Oct      Nov      Dec
1949 4.912655 4.779123 4.644391 4.770685
1950 5.062595 4.890349 4.736198 4.941642
1951 5.214936 5.087596 4.983607 5.111988
1952 5.342334 5.252273 5.147494 5.267858
1953 5.468060 5.351858 5.192957 5.303305
1954 5.556828 5.433722 5.313206 5.433722
1955 5.743003 5.613128 5.468060 5.627621
1956 5.872118 5.723585 5.602119 5.723585
1957 6.001415 5.849325 5.720312 5.817111
1958 6.001415 5.883322 5.736572 5.820083
1959 6.137727 6.008813 5.891644 6.003887
1960 6.230481 6.133398 5.966147 6.068426

predtoolsTS documentation built on May 2, 2019, 5:54 a.m.