extrafont | Tools for using fonts in R graphics | User Interface library

I am trying to create an interactive scatterplot using ggplotly. This will include a scatterplot with the interactivity to highlight each point's country name, and a line of best fit. However, when I add the text argument to my ggplot (in order to create interactive labels) it removes the line of best fit. I have tried to isolate the text argument to just the geom_point function, as suggested in a previous stack overflow post, but this does not solve the issue.

Would someone be able to offer a solution?

Thanks in advance.

My data includes a column for country name, a column for its gdp and a column for its world happiness index score ranging from 1 - 8.

Just as a randomly generated example:

My code is as follows:

I'm trying to write up a report and simply want to include a .jpeg image in my write up. However, whenever i knit together my document, I get the following error:

I would like to change the font type for my plot title and also the data label to make my plot a little less "dull". I have tried font_import() alongside family="Comic Sans MS" (amongst other failed efforts) but nothing seems to alter the font type. I have researched other similar question responses but yet to figure out where I am going wrong. Below is my code:

I've written a function to share among colleagues for graphing, and my organization prefers Calibri to the ggplot2 default Arial for the text. If I were the only person who'd be using this function, I would first do this at the top of my script:

I have an rmarkdown file for which I want to change the font to a custom font (not native to Windows). What I did so far:

1. I got the .ttf file(s) for the font and installed them on Windows. I can actually access it now in Word, so that part worked.
2. I edited the YAML part pf my rmarkdown file to reference the font. When I try this with fonts native to Windows (Arial, etc.) this works, so in general the code itself should not be wrong.

EDIT: I found that it also does not work for some of the pre-installed windows fonts, like Bahnschrift (which might be german-specific)

1. I tried on 2 different PCs and both with lualatex and xelalatex. As described below I also tried extrafont for the plots and it doesnt recognize the font either.

Here YAML code: the rest of the rmarkdown is really just the unchanged template. Round Style is just an example.

I am trying to reproduce a scatter plot with some parallel lines as below:

What I tried in R is:

I have a Rmarkdown file that uses 3 libraries: extrafont,ggplot2,dplyr. I have to generate a PDF after knitting this document. But it gives me an error as below:

I have a set of points in a scatter plot as below. I want to change the shape of one point or few points. I searched for this but could not find a way to do it.

I want to achieve like this

And like this

Code:

I'm trying to use unicode symbols as geom_point shapes in ggplot. It mostly works as expected, but one symbol (▶, "\u25b6") doesn't show in the RStudio plot and in a pdf none of the symbols show up. Here's my example (the data show user input during listening to music):