Grouped barplot using R barplot function

Question

I am using the following code to get grouped barplot using R barplot function.

> df <- read.csv2(text = "x;y;z
  A;40;11
  B;66;16
  C;27;13
  D;10;42")
> bp <- barplot(t(df[ , -1]), beside=T, names=df$x)

but this is not working when my data has decimals. Like I can't get a barplot if my data is like:

> df <- read.csv2(text = "x;y;z
  A;40.9;11
  B;66;16
  C;27;13
  D;10;42")

Is there a way to modify this code to get plots for the decimal values as well? I want to use R barplot function, rather than going into some R package.

Thank you

make sure that the columns you transpose are numeric. in your example, y is a character, so if you fix that, it should work — rawr
– rawr, Commented Jan 18, 2021 at 6:03
I didn't get it. Would you please elaborate a little? Thank you. — Ali_A423
– Ali_A423, Commented Jan 18, 2021 at 17:56

pascal · Accepted Answer · 2021-01-18 06:04:22Z

1

Use a comma rather than a dot in your df:

> df <- read.csv2(text = "x;y;z
  A;40,9;11
  B;66;16
  C;27;13
  D;10;42")

answered Jan 18, 2021 at 6:04

pascal

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Comments

Ronak Shah · Accepted Answer · 2021-01-18 06:48:30Z

0

You can use type.convert to convert the character type of data to numeric.

barplot(type.convert(t(df[-1])), beside = TRUE, names=df$x)

answered Jan 18, 2021 at 6:48

Ronak Shah

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2 Comments

Ali_A423 Over a year ago

Thank you so much, it worked. However, the fill option is not working to define color of the bars, with this method. Is there any solution to it?

Ronak Shah Over a year ago

You can specify color using col argument. Try barplot(type.convert(t(df[-1])), beside = TRUE, names=df$x, col = c('red', 'green'))

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