esys.escript.timeseries

Module timeseries

Author: Lutz Gross, l.gross@uq.edu.au

License: Licensed under the Open Software License version 3.0 http://www.opensource.org/licenses/osl-3.0.php

Classes

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Controler
Controls a set of TimeSeries.

DataCatcher
Collects data into a time series.

Exp
Computes exp(TimeSeries).

Plotter

Reader
Reads a list of input streams and creates a time series for each input stream but on the same Controler where the first column is used to create the time nodes.

TimeSeries
Makes TimeSeriesBaseDataset look like a TimeSeries and introduces operations.

TimeSeriesAdd
Adds two TimeSeries.

TimeSeriesAddScalar
Adds a single value to a TimeSeries.

TimeSeriesBase
The TimeSeriesBase class is the base class for all classes of the TimeSeries module.

TimeSeriesBaseBuffer
An implementation of TimeSeriesBaseDataset which actually is storing data in a numarray buffer.

TimeSeriesBaseDataset
Provides an interface for accessing a set of linearly ordered data.

TimeSeriesControlerView
A TimeSeriesControlerView is attached to a Controler and moves forward in time by increasing the id of the last processed datum.

TimeSeriesCumulativeSum
Cumulative sum of the time series values.

TimeSeriesDiv
Divides two TimeSeries.

TimeSeriesDivScalar
Divides a scalar by a TimeSeries.

TimeSeriesFilter
A TimeSeriesFilter is a TimeSeries that is created through a TimeSeriesOperator.

TimeSeriesMult
Multiplies two TimeSeries.

TimeSeriesMultScalar
Multiplies a TimeSeries with a single (scalar) value.

TimeSeriesOperator
A TimeSeriesOperator decribes an operation acting on a list of TimeSeries time_series_args.

TimeSeriesPower
Raises one TimeSeries to the power of another TimeSeries.

TimeSeriesPowerScalar
Raises a TimeSeries to the power of a scalar.

TimeSeriesShift
Creates a shift of the time series, i.e.

Writer
Writes the time series into an output stream ostream which must have the writeline method.

Functions

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differential(time_serie)
Calculates the derivative Dv of the time series v:

integral(time_serie)
Calculates the intagral Iv of the time series v using the trapezoidal rule:

leakySmooth(time_serie, l=0.99)
Leaky smoother:

smooth(time_serie, range=5)
Smoothes a time series using the previous and next range values at each time.

viewer(time_serie, seperator=',')
Creates a viewer for a time series.

Variables

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DEFAULT_BUFFER_SIZE = 1000

DEFAULT_FLOAT_TYPE = Float64

__url__ = 'https://launchpad.net/escript-finley'

Function Details

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differential(time_serie)

Calculates the derivative Dv of the time series v:

Dv[n]=(v[n]-v[n-1])/(t[n]-t[n-1])

integral(time_serie)

Calculates the intagral Iv of the time series v using the trapezoidal rule:

Iv[n]=int_{t_0}^{t_n} v ~ sum_{0<i<=n} n (v[i]+v[i-1])/2*(t[i]-t[i-1])

leakySmooth(time_serie, l=0.99)

Leaky smoother:

s(t)=int_{t_0}^{t} v(r) l^{t-r} dr/ int_{t_0}^{t} l^{t-r} dr