Linear weight function

Description

Builds a linear time weight function to compute the TWDTW local cost matrix [1].

Usage

1
linearWeight(a, b = 0)

Arguments

a

numeric. The slop of the line.

b

numeric. The intercept of the line.

Details

The linear linearWeight and logisticWeight weight functions can be passed to twdtwApply through the argument weight.fun. This will add a time-weight to the dynamic time warping analysis. The time weight creates a global constraint useful to analyse time series with phenological cycles of vegetation that are usually bound to seasons. In previous studies by [1] the logistic weight had better results than the linear for land cover classification. See [1] for details about the method.

Value

An function object.

Author(s)

Victor Maus, vwmaus1@gmail.com

References

[1] Maus V, Camara G, Cartaxo R, Sanchez A, Ramos FM, de Queiroz, GR. (2016). A Time-Weighted Dynamic Time Warping method for land use and land cover mapping. Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of, vol.PP, no.99, pp.1-11.

See Also

twdtwApply

Examples

1
2
lin_fun = linearWeight(a=0.1)
lin_fun

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