How do you plot error bars (mean+/-SD)?

How do you plot error bars (mean+/-SD)?

I have tried so many different ways but they keep coming up with error messages. Please can you help?

I think the command is r plot error bars in your search engine.
It is always nice, to include some more information when submitting a question:

  • what exactly did you try
  • what error message did show up.

All the best!

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