# Help for an R studio

I got below project for an ongoing course and facing some difficulties to solve it.

Simply I'm trying to create different types of graphs based on a give excel sheet. When I run the code I

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))``````

Hi, welcome!

Please have a look to our homework policy, homework inspired questions are welcome but they should not include verbatim instructions from your course.

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.

Many thanks for the clarification, I updated the post accordingly

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.