ggplot2 boxplot

Question

I am trying to plot boxplot using ggplot2. sample data is like this.

> sampe

count genotype
71       mt
50       mt
71       mt
95       wt
60       mt
63       mt
75       mt
82       wt
93       wt
87       wt
61       mt
102       wt
60       mt
78       wt
78       wt
87       wt
84       wt
104       wt
81       wt
85       mt


> qplot(factor(genotype),count,data=sampe,geom="boxplot")

The above command produces plot like this:

what's wrong here?? why is it plotting like this?? Even this below code produces same output.

ggplot(sampe,aes(x=factor(genotype),y=count))+geom_boxplot()

Answer 1

I think your problem is that your Y-axis is not actually count, R understand count as a variable. Actually you only need to group the data by genotype and than do ggplot2.

df %>% group_by(genotype)
ggplot(df) +
  geom_boxplot(mapping = aes(x=genotype, y = count))

Answer 2

Ok.. I 'll answer my own question. As per the suggestion count values were stored as factor. Converting them to numeric did the trick

qplot(factor(genotype),as.numeric(count),data=sampe,geom="boxplot")

Thank you all for the suggestions.