Orange: Difference

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Sumber: https://orange.biolab.si/widget-catalog/time-series/difference/

Widget Difference membuat sebuah time series stationary dengan cara menggantinya dengan 1st atau 2nd order discrete difference dari nilai-nilai-nya. Dalam bahasa matematika sederhana, widget Difference mengganti nilai time series input menjadi turunan pertama atau ke dua secara diskrit (digital).

Input

Time series: Time series as output by As Timeseries widget.

Output

Time series: Differences of input time series.
Difference-stamped.png


  • Order of differencing. Can be 1 or 2.
  • The shift before differencing. Value of 1 equals to discrete differencing. You can use higher values to compute the difference between now and this many steps ahead.
  • Invert the differencing direction.
  • Select the series to difference.

Untuk meng-integrasikan agar time series hasil widget Difference kembali ke nilai awal time series (misalnya, forecast), kita dapat menggunakan widget Moving Transform.


Referensi

Pranala Menarik