detrend: detrend
In NCAR/Ranadu: Functions for use with RAF aircraft data files
detrend R Documentation
detrend
Description
Simple removal of mean and trend from a time series.
Usage
detrend(.data, silent = TRUE)
Arguments
.data
A data.frame containing variable 'Time' as the first column and
a second-column from which to remove the mean and trend.
silent
Prints mean and trend only if set FALSE. Default is TRUE.
Details
Input must be a data.frame where the first column is 'Time'
and the second is the variable from which to remove the mean and trend.
Removing the mean often provides less numerical inaccuracy, and removing
a trend (for spectral analysis) avoids the effect of a ramp function
on an fft-produced spectrum for which the time series is assumed repetitive.
For this calculation, NA values are replaced by interpolation or, where that
is not possible, by zeroes.
Value
A modified version of data[, 2] only, with mean and trend removed.
Author(s)
William Cooper
Examples
AT <- detrend (RAFdata[, c('Time', 'ATX')])
NCAR/Ranadu documentation built on Jan. 27, 2023, 1:09 a.m.
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| detrend | R Documentation |
detrend
Description
Simple removal of mean and trend from a time series.
Usage
detrend(.data, silent = TRUE)
Arguments
.data |
A data.frame containing variable 'Time' as the first column and a second-column from which to remove the mean and trend. |
silent |
Prints mean and trend only if set FALSE. Default is TRUE. |
Details
Input must be a data.frame where the first column is 'Time' and the second is the variable from which to remove the mean and trend. Removing the mean often provides less numerical inaccuracy, and removing a trend (for spectral analysis) avoids the effect of a ramp function on an fft-produced spectrum for which the time series is assumed repetitive. For this calculation, NA values are replaced by interpolation or, where that is not possible, by zeroes.
Value
A modified version of data[, 2] only, with mean and trend removed.
Author(s)
William Cooper
Examples
AT <- detrend (RAFdata[, c('Time', 'ATX')])
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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