After seeing the chart, you probably already know the answer.Ĭonclusion: in this example, when using the FORECAST.ETS function, you can also use the value 4 for the fourth argument. You can use the function to find the length of the seasonal pattern. Enter the value 49 into cell C13, select the range A1:C17 and insert a scatter plot with straight lines and markers.ģ. The default value of 1 indicates seasonality is detected automatically.Ģ. The fourth argument indicates the length of the seasonal pattern. The FORECAST.ETS function below predicts a future value using Exponential Triple Smoothing. The FORECAST.ETS function in Excel 2016 or later is a great function which can detect a seasonal pattern.ġ. This equation predicts the same future values. Note: when you add a trendline to an Excel chart, Excel can display the equation in a chart. I want excel to tell me the curve of best fit for these points and the equation for this curve. I have a set of experimental data that forms a sinusoidal function. Enter the value 89 into cell C11, select the range A1:C14 and insert a scatter plot with straight lines and markers. Equation of trendline for sinusoidal function. Explanation: when we drag the FORECAST.LINEAR function down, the absolute references ($B$2:$B$11 and $A$2:$A$11) stay the same, while the relative reference (A12) changes to A13 and A14.Ģ.
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