[R] Problems with boxplot in ggplot2:qplot

[Dimitri Shvorob]

Dataframe closed contains balances of closed accounts: each row has month of
closure (Date-type column month) and latest balance. I would like to plot
by-month distributions of balances. A qplot call below produces several
warnings and no output. 

Can anyone help?

Thank you.

PS. A really basic task, very similar to the examples on p. 71 of the
ggplot2 book, apart from a Date grouping column; I am quite surprised to
have problems with it. lattice package to the rescue?


> qplot(factor(month), balance, data = closed, geom = "boxplot", xlim =
> range(closed$month))
There were 13 warnings (use warnings() to see them)

> warnings()
Warning messages:
1: Removed 1 rows containing missing values (stat_boxplot).
2: Removed 7 rows containing missing values (geom_point).
3: Removed 5 rows containing missing values (geom_point).
4: Removed 8 rows containing missing values (geom_point).
5: Removed 3 rows containing missing values (geom_point).
6: Removed 5 rows containing missing values (geom_point).
7: Removed 2 rows containing missing values (geom_point).
8: Removed 12 rows containing missing values (geom_point).
9: Removed 2 rows containing missing values (geom_point).
10: Removed 1 rows containing missing values (geom_point).
11: Removed 2 rows containing missing values (geom_point).
12: Removed 3 rows containing missing values (geom_point).
13: Removed 4 rows containing missing values (geom_point).

> p = qplot(factor(month), balance, data = closed, geom = "boxplot", xlim =
> range(closed$month))
> plot(p)
Error in plot.window(...) : need finite 'xlim' values
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