PhD in biomaterials... enthusiastic about data science and programming.
For new users:
Please take a look at [How to make a great R reproducible example](https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example), to modify your question, with a smaller sample taken from your data (check?dput()
). Posting images of your data or no data makes it difficult to impossible for us to help you!
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Last seen Dec 11 '19 at 17:46