histogram breaks when NAs are present

[ste-fan]

When trying to plot a histogram of a variable that contains NAs, I get:

library(ggvis)

df <- data.frame( var = c(NA, rnorm(100)) )

df %>%
  ggvis(~var) %>%
  layer_histograms()

## Guessing binwidth = 0.172 # range / 30
## Error in seq.default(round_any(range[1], size, floor), round_any(range[2],  : 
##   'from' cannot be NA, NaN or infinite

Getting rid of observations with NAs solves the problem.

library(dplyr)

df %>% filter(!is.na(var)) %>%
  ggvis(~var) %>%
  layer_histograms()

## Guessing binwidth = 0.172 # range / 30

Should that be done automatically? ggplot2 does not even complain about NAs and just plots, as if they weren't there.

library(ggplot2)

df %>% 
  ggplot(aes(var)) + 
  geom_histogram()

## stat_bin: binwidth defaulted to range/30. Use 'binwidth = x' to adjust this.

sessionInfo()

## R version 3.1.0 (2014-04-10)
## Platform: x86_64-pc-linux-gnu (64-bit)
## 
## locale:
##  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
##  [3] LC_TIME=de_DE.UTF-8        LC_COLLATE=en_US.UTF-8    
##  [5] LC_MONETARY=de_DE.UTF-8    LC_MESSAGES=en_US.UTF-8   
##  [7] LC_PAPER=de_DE.UTF-8       LC_NAME=C                 
##  [9] LC_ADDRESS=C               LC_TELEPHONE=C            
## [11] LC_MEASUREMENT=de_DE.UTF-8 LC_IDENTIFICATION=C       
## 
## attached base packages:
## [1] stats     graphics  grDevices utils     datasets  methods   base     
## 
## other attached packages:
## [1] ggplot2_0.9.3.1 dplyr_0.2       ggvis_0.2.0.99 
## 
## loaded via a namespace (and not attached):
##  [1] assertthat_0.1.0.99 bitops_1.0-6        caTools_1.17       
##  [4] colorspace_1.2-4    digest_0.6.4        filehash_2.2-2     
##  [7] grid_3.1.0          gtable_0.1.2        httpuv_1.3.0       
## [10] labeling_0.2        magrittr_1.0.0      MASS_7.3-33        
## [13] munsell_0.4.2       parallel_3.1.0      plyr_1.8.1         
## [16] proto_0.3-10        Rcpp_0.11.1         reshape2_1.4       
## [19] RJSONIO_1.2-0.2     scales_0.2.4        shiny_0.9.1.9008   
## [22] stringr_0.6.2       tikzDevice_0.7.0    tools_3.1.0        
## [25] xtable_1.7-3       

[wch]

We don't have consistent NA handling in ggvis. That's something we'll be working on for the next release (or perhaps the one after that).