Doesn't work with factor variables

[reinholdsson]

The app never finish to load. No error is shown.

a <- as.factor(sample(1990:2010, 100000, replace = T))
b <- sample(1:100, 100000, replace = T)

dt <- data.table(AR = a, IRR = b)
iPlot(dt)

It works without AR.

[reinholdsson]

For some reason, it does work with two numerical variables:

a <- as.factor(sample(1990:2010, 100000, replace = T))
b <- sample(1:100, 100000, replace = T)

dt <- data.table(AR = a, IRR = b, IRR2 = b+1)
iPlot(dt)