Get a feel of the data
Some quick ways to visualise new data.
For an initial 'feel' of the data:
plot(mydata)
summary(mydata)
Summarise the mean of 'cloud' by two factors:
tapply(cloud, list(rain, winddir), mean)
Summarise 2 continuous and 1 factor variable:
plot(hour,rad,col=day)
Standard deviation of data
sd <- sd(mydata)
Coefficient of variation of data
cv <- sd(mydata)/mean(mydata)