Code not working in "ChemometricsWithR" on Mac

[eekuadzi]

pairs(wines[,1:3], pch = wine.classes, col = wine.classes)
Error in pairs.default(wines[, 1:3], pch = wine.classes, col = wine.classes) :
object 'wine.classes' not found.

I am new to the R community, and trying to teach myself to do Chemometrics using R. I am using the textbook, Chemometrics With R and it has an R package "ChemometricsWithR". When I try to plot the above pairs (wines[.....) it returns an error in pairs. I would be happy to learn why it is not working and what the work around is.

Thanks in advance

[andresrcs]

@eekuadzi

object 'wine.classes' not found.

The error message is self explanatory, there is nothing called wine.classes in your working environment, to help you overcome this problem, it would be useful if you could provide a reproducible example.

If you've never heard of a reprex before, you might want to start by reading this FAQ:

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.2…

[eekuadzi]

@andresrcs

dput(head(iris, 5)[c("Sepal.Length", "Sepal.Width")])

Thanks andresrcs. Your response helped me identify the error. I managed to do the plot. Based on the example in the reprex help.