dyAxis > valueRange documentation mistake

[pi0tr3k]

Documentation says that I can set Y axis boundaries using valueRange property of dyAxis:

valueRange: Explicitly set the vertical range of the graph to c(low, high) . This may be set on a per-axis basis to define each y-axis separately. If either limit is unspecified, it will be calculated automatically (e.g. c(NULL, 30) to automatically calculate just the lower bound).

It should be NA not NULL, below is a snippet that doesn't work as expected:

value <- c(200, 300, 400, 350, 250, 375)
df <- data.frame(day,value)
dfXts <- xts(df[,-1], order.by = df[, 1])
graph <-  dygraph(dfXts) %>% dyAxis('y', valueRange = c(0, NULL)) %>% dySeries(name = "V1", label="VALUE", axis = 'y')
graph

I would expect that setting valueRange = c(0, NULL) will make Y axis start at 0 and end in this case with ~450.
Unfortunatelly the Y axis starts with 180.
I need to replace NULL with specific value, then it works fine: valueRange = c(0, 450)

When you don't know the maximum value the solution is to use valueRange = c(0, NA)