Loop ggplot for different variables in dataframe

Question

I want to loop ggplot and obtain a graph for each variable code is below. I get an error in aes

df <- data.frame(ID = c("a", "b"), A = rnorm(2), B = runif(2), C = rlnorm(2))
for(i in df[,2:ncol(df)]){
 plt<-ggplot(data=df, aes(x=df$ID, y = df[,2:ncol(df)]$i))+
    geom_bar()
  print(plt)
}

What is the problem?

I know I could use facet_grid.

ggplot(df_melt, aes(x=ID,y=value)) + geom_bar(stat="identity") + facet_grid(~variable)

F. Privé · Accepted Answer · 2017-07-09 13:49:38Z

5

df <- data.frame(ID = c("a", "b"), A = rnorm(2), B = runif(2), C = rlnorm(2))

for (colname in names(df)[-1]) {
  plt <- ggplot(data = df, aes_string("ID", y = colname)) +
    geom_bar(stat = "identity")
  print(plt)
}

edited Jul 9, 2017 at 13:49

answered Jul 9, 2017 at 13:44

F. Privé

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1 Comment

F. Privé Over a year ago

Note that you can now replace geom_bar(stat = "identity") by geom_col().

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