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The TS Forecast tool provides forecasts from either an ARIMA or ETS model for a user specified number of future periods. In addition, upper and lower confidence interval bounds are provided for two different (user specified) percentage confidence levels. For each confidence level, the expected probability that the true value will fall within the provided bounds corresponds to the confidence level percentage.
This tool uses the R programming language. Go to Options > Download Predictive Tools to install R and the packages used by the R Tool.
The field name for the point forecast: The field name for the point forecasts in the output data stream. This name is also used as a prefix to the confidence bounds.
The percentage value of the larger confidence interval: This value can range from 1 to 99. Commonly used values for this range are 95 or 99 percent.
The percentage value of the smaller confidence interval: This value can range from 1 to 99. Commonly used values for this range are 80 or 90 percent.
The number of periods into the future to forecast: Both the point forecasts and the confidence bounds will be available for the specified number of future periods.
Graph resolution: Select the resolution of the graph in dots per inch: 1x (96 dpi); 2x (192 dpi); or 3x (288 dpi). Lower resolution creates a smaller file and is best for viewing on a monitor. Higher resolution creates a larger file with better print quality.
O Output: Contains a data stream of the forecast values and confidence bounds.
R Output: Consists of the report snippets of a table with the forecast values and confidence bounds and a forecast plot that shows both the historical values of the time series and forecast values with error bounds.
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