VGAM (version 0.9-3)

mmt: mmt daily maximum temperatures

Description

Melbourne daily maximum temperatures in degrees Celsius over the ten-year period 1981--1990.

Usage

data(mmt)

format

A vector with 3650 observations.

Details

This is a time series data from Melbourne, Australia. It is commonly used to give a difficult quantile regression problem since the data is bimodal. That is, a hot day is likely to be followed by either an equally hot day or one much cooler. However, an independence assumption is typically made.

References

Hyndman, R. J. and Bashtannyk, D. M. and Grunwald, G. K. (1996). Estimating and visualizing conditional densities. J. Comput. Graph. Statist., 5(4), 315--336.

See Also

lms.bcn.

Examples

summary(mmt)
par(mfrow = c(1, 1), mar = c(5, 4, 0.2, 0.1) + 0.1, las = 1)
melb <- data.frame(today     = mmt[-1],
                   yesterday = mmt[-length(mmt)])
plot(today ~ yesterday, data = melb,
     xlab = "Yesterday's Max Temperature",
     ylab = "Today's Max Temperature", cex = 1.4, type = "n")
points(today ~ yesterday, data = melb, pch = 0, cex = 0.50, col = "blue")
abline(a = 0, b = 1, lty = 3)