the error shown in the photo. Any help on how it can be resolved?
Below is the code I developed
# Changing format
Data1$Date <- as.Date(Data1$Date)
Data1$Department <- as.factor(Data1$Department)
Data1$Category <- as.factor(Data1$Category)
Data1$CustomerCode <- as.character(Data1$CustomerCode)
Data1$Price <- as.factor(Data1$Price)
Data1$Quantity <- as.factor(Data1$Quantity)
# Summary statistics of a column in R
summary(Data1$Quantity)
summary(Data1$Price)
#count of NA values in each column
sum(is.na(df$Date))
sum(is.na(df$Department))
sum(is.na(df$Category))
sum(is.na(df$CustomerCode))
sum(is.na(df$Price))
sum(is.na(df$Quantity))
#Display a bar chart for Category column.
ggplot(Data1, aes(x = Category))
geom_bar()
#Display the Departments and their revenue using a bar chart
barplot(Data1$Department)
#Create a histogram and box and whisker plot of the Price and Quantity columns
hist(Data1$Price, prob = TRUE, col = "white",main = "")
boxplot(Data1$Price, horizontal = TRUE, axes = FALSE, col = rgb(0, 0.8, 1, alpha = 0.5))
hist(Data1$Quantity, prob = TRUE, col = "white",main = "")
boxplot(Data1$Quantity, horizontal = TRUE, axes = FALSE, col = rgb(0, 0.8, 1, alpha = 0.5))
The Homework Policy mentions a reproducible example. It is well worth reading it very carefully. It is often impossible to help someone without the information asked for there.
Why does your script of code manipulate Data1 and then report some facts about an df before attempting to plot with Data1 ; is df at all relevant ? Not sure if its a case of you not cleaning up your code; or if its a sign of confusion about how your code works. On its face your error seems impossible as its a claim that Data1$Date is both zero length and length 34433; I struggle to see how I could make my R session believe this about any variable of mine... the closest I can get is if I clearly mistype the variable on the right , so the non-existant column is zero length; but yours doesnt appear to be mistyped.
Its hard to fix any bug that can not be reproduced, to read about reproducing bugs; please read:
