FRAPO (version 0.4-2)

trdsma: Simple Moving Average

Description

Calculation of a right ended simple moving average with equal weights determined by n.periods.

Usage

trdsma(y, n.periods, trim = FALSE)

Value

An object of the same class as y, containing the computed simple moving averages.

Arguments

y

Objects of classes: numeric, matrix, data.frame, ts, mts, and timeSeries are supported.

n.periods

Integer, the number of periods to be included in the calculation of the simple moving average.

trim

Logical, if FALSE (the default) the first value is set to NA, otherwise the object is trimmed by the first obeservation.

Methods

y = "data.frame"

The calculation is applied per column of the data.frame and only if all columns are numeric.

y = "matrix"

The calculation is applied per column of the matrix.

y = "mts"

The calculation is applied per column of the mts object. The attributes are preserved and an object of the same class is returned.

y = "numeric"

Calculation of the es trend.

y = "timeSeries"

The calculation is applied per column of the timeSeries object and an object of the same class is returned.

y = "ts"

Calculation of the es trend. The attributes are preserved and an object of the same class is returned.

y = "xts"

Calculation of the es trend. The attributes are preserved and an object of the same class is returned.

y = "zoo"

Calculation of the es trend. The attributes are preserved and an object of the same class is returned.

Author

Bernhard Pfaff

See Also

filter, trdbilson, trdbinary, trdhp, trdwma, capser, trdes

Examples

data(StockIndex)
y <- StockIndex[, "SP500"]
sma <- trdsma(y, n.periods = 24)
head(sma, 30)