MAD and MSE

Absolute Errors

Absolute errors measure miss size without sign.

highlighted = computed this step

Absolute Error

Absolute error ignores direction and keeps distance from actual.

∣actual−forecast∣|\text{actual}-\text{forecast}|
Absolute and squared errorsThe table exposes each absolute and squared error before averaging.absolute and squared errorserrorabsolutesquaredperiod one111period two111period three-339period four111

Largest Absolute

The largest absolute error is 3.

max⁡∣error∣=3\max |\text{error}|=3
Forecast error metricsThe chart pairs row-level error bars with exact summary metrics.MAD and MSEMAD 3/2; MSE 3; MAPE 7/48periodactualforecasterrorabssquared1109111212111113912-33941514111period 1abs error 1period 2abs error 1period 3abs error 3period 4abs error 1sum error0MAD3/2MSE3MAPE7/48what-if MAD 1; MSE 1; MAPE 13/144