Hi, I'm hoping someone could help me with the code I need. I have three columns of data, one of tree species, one of stomatal density of leaves, and one of year in which the leaf was sampled. I want to plot the change in stomatal density over time, showing each species on a separate line but on the same graph. Is this possible and if so what is the relevant code? Thank you in advance for any help.
As a beginner to R you may benefit from studying this useful book.
It has an excellent chapter on visualisation/graphing you could study
Thank you very much for your help, it was very useful.
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