How do you plot using GGPLOT in Power BI?

We saw an example of plotting using GGPLOT earlier in the RGUI.

Herein we use ggplot in Power BI.

We connect to Northwind database on an instance of SQL Server 2016 Developer. We load data from Products and OrderDetails table into Power BI.

We drop the R Script Visual from the Visualizations onto the designer.

ggplot2
The R script editor opens up as shown


ggplot_03

Add the following code as shown:
-------------------------------
library(ggplot2)
y=ggplot(data=dataset, aes(x=ProductName, y=Quantity))
y=y + geom_point(aes(color="red"))
-------------------------
If you run this code using the R script

You get an error:

Now modify the above to this:
---------------------------
library(ggplot2)
y=ggplot(data=dataset, aes(x=ProductName, y=Quantity))
y=y+geom_point(aes(color="red"))
y=y+geom_point(aes(size=Quantity))
y
---------------------
Now run the script. You will see the plot as shown. The size shows the value of "Quantity" and the color=red is supposed to make it red.

The correct code for aes is modified to this:
-------------------
library(ggplot2)
y=ggplot(data=dataset, aes(x=ProductName, y=Quantity))
y=y+geom_point(aes(size=Quantity, color="red"))
y
-------------------
Run this code again. You get the following visualization.

Looks like there may some error in rendering of the color. Changing it to blue makes it still 'red'.