mape computes the average absolute percent difference between two numeric vectors.
mape(actual, predicted)The ground truth numeric vector.
The predicted numeric vector, where each element in the vector
is a prediction for the corresponding element in actual.
mape is calculated as the average of (actual - predicted) / actual.
This means that the function will return -Inf, Inf, or NaN
if actual is zero. Due to the instability at or near zero, smape or
mase are often used as alternatives.
# NOT RUN {
actual <- c(1.1, 1.9, 3.0, 4.4, 5.0, 5.6)
predicted <- c(0.9, 1.8, 2.5, 4.5, 5.0, 6.2)
mape(actual, predicted)
# }
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