Creating a Heatmap with ggplots2

[FJCC]

Another problem I see is that the Abundance column is of the type character. You can fix that

mine.long$Abundance <- as.numeric(mine.long$Abundance)

However, I do not expect that to fix the error message. Can you make a reproducible example from a subset of your data? It would be enough to have two categories of sample.name and two of Metabolite. Then post the data and the call to ggplot. Others can then work with exactly the data you are using. Information about how to make a reproducible example are in the following post:

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.…