Syntax error How to create bar plot with gradient colors using ggplot2 in R?\\n

How to create bar plot with gradient colors using ggplot2 in R?\\n

To create bar plot with gradient colors using ggplot2, we can use scale_fill_gradient function where we can set the lower and higher color values.

For Example, if we have a data frame called df that contains two columns say Cat and Count then we can create the bar plot with gradient colors by using the below command −

ggplot(df,aes(Cat,Count,fill=Cat))+geom_bar(stat="identity")+scale_fill_gradient(low="blue",high="red")

Example

Following snippet creates a sample data frame −

x<-LETTERS[1:5]
y<-c(27,25,24,21,20)
df<-data.frame(x,y)
df

The following dataframe is created

  x  y
1 A 27
2 B 25
3 C 24
4 D 21
5 E 20

To load ggplot2 package and create bar plot for data in df on the above created data frame, add the following code to the above snippet −

x<-LETTERS[1:5]
y<-c(27,25,24,21,20)
df<-data.frame(x,y)
library(ggplot2)
ggplot(df,aes(x,y))+geom_bar(stat="identity")

Output

If you execute all the above given snippets as a single program, it generates the following Output −

To create bar plot for data in df having bars filled with gradient color on the above created data frame, add the following code to the above snippet −

x<-LETTERS[1:5]
y<-c(27,25,24,21,20)
df<-data.frame(x,y)
library(ggplot2)
ggplot(df,aes(x,y,fill=y))+geom_bar(stat="identity")+scale_fill_gradient(low="blue",high="red")

Output

If you execute all the above given snippets as a single program, it generates the following Output −

Updated on: 2021-11-12T04:01:29+05:30

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