How to make a facetted spaghetti chart in ggplot?

[Irakli]

How can I make a facetted spaghetti chart that retains all the lines, highlighting only the line that represents a given facet?

I am creating this chart and I want to show all the data on each facet only highlighting a single city.

Any help would be appreciated.

[mara]

Take a look at the gghighlight package, which allows you to facet wrap by a variable, and then have that variable highlighted in the facet itself.

Introduction to gghighlight

[Irakli]

Thank you for the answer. I did that right after asking this question and it worked perfectly. So anyone who might have the same question, highlighting a group variable can highlight each category on a separate facet. Just follow the simple gghighlight tutorial.

[mara]

If your question's been answered (even if by you), would you mind choosing a solution? (See FAQ below for how).

Having questions checked as resolved makes it a bit easier to navigate the site visually and see which threads still need help.

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Thanks