r - Strange behavior of y axis in histograms -

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i want put set of histograms of different variables on same scaled y axis using ggivs. however, once axes meaningfully larger highest count variable start strange , start plotting bars in negative direction. data http://rpubs.com/elinw/116698

here reproducable example

# no values specified iris %>% ggvis(~sepal.width) %>% layer_histograms(width = 1)  %>%    add_axis("y", title = "count", title_offset="50")     add_axis("x", title = "width", title_offset="50")   #0 150  iris %>% ggvis(~sepal.width) %>% layer_histograms(width = 1)  %>%    add_axis("y", title = "count", title_offset="50",  values = seq(0,150, = 10))  %>%    add_axis("x", title = "width", title_offset="50")     #0 175  iris %>% ggvis(~sepal.width) %>% layer_histograms(width = 1)  %>%    add_axis("y", title = "count", title_offset="50",  values = seq(0,200, = 10))  %>%    add_axis("x", title = "width", title_offset="50")    #0 250  iris %>% ggvis(~sepal.width) %>% layer_histograms(width = 1)  %>%    add_axis("y", title = "count", title_offset="50",  values = seq(0,250, = 10))  %>%    add_axis("x", title = "width", title_offset="50")   #0 500  iris %>% ggvis(~sepal.width) %>% layer_histograms(width = 1)  %>%    add_axis("y", title = "count", title_offset="50",  values = seq(0,500, = 10))     add_axis("x", title = "width", title_offset="50")

i've read documentation don't see this. there in properties can change make work? or there known rule this? or bug?

the argument values in add_axis sets ticks on axis, not change minimal , maximal limits of axis (ylim/xlim). according ggvis doc, need set argument domain in scale_numeric(). try this:

iris %>% ggvis(~sepal.width) %>% layer_histograms(width = 1)  %>%   add_axis("y", title = "count", title_offset="50",  values = seq(0,150, = 10))  %>%   ## set axis limits:   scale_numeric("y", domain = c(0, 150), nice = false) %>%    add_axis("x", title = "width", title_offset="50")

you can see plots here: http://rpubs.com/scoa/116718


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