R：ggplot。 箱形图中用于循环的轴标签

Question

I am using a for loop to create multiple box plots for a large dataset I have (320269 observables of 170 variables).

For this I am using the following code to generate the boxplots:

nm <- names(data)
for (i in 1:(ncol(data)-1)){
print(ggplot(data,aes(as.factor(data$Month),data[c(i)],color=as.factor(data$Month),aes_string("Month",nm[i])))
 + geom_boxplot(outlier.colour="black",outlier.shape=16,outlier.size=1,notch=FALSE))}

The graphs are printed in pdf and the boxplot itself comes out correctly, but something goes wrong with the axis labels. No matter what I try, I get the x-axis label: as.factor(data$Month) , and on the y-axis: data[c(i)] , instead of "Month" on the x-axis and the actual column-names from the dataset on the y-axis.

What am I missing?

Your help is much appreciated.

Answer 1

You can specify x and y axis labels by + xlab() and + ylab()

for (i in 1:(ncol(data)-1)){
  print(ggplot(data,aes(as.factor(data$Month),data[c(i)],color=as.factor(data$Month)))
        + geom_boxplot(outlier.colour="black",outlier.shape=16,outlier.size=1,notch=FALSE)
        + xlab("Month")
        + ylab(colnames(data)[i])
  )
}