rworldmap | R package for mapping country data | Map library

I need to plot the names of the countries that are present in my dataframe only, not all world countries. Any suggestions?

I'm trying to create a country map with specific regions filled in. I want to divide the country in 3 categories: extreme, high, too high. So in each category there will be a number of regions(DEPARTAMEN). Each category should have a specific color (black, red, orange). Let's say , for example, in extreme category there will be 8 regions(DEPARTAMEN) with the same color (black).

The first answer is exactly what I want, but I couldn't do the same because I can´t use the rworldmap package in this case: How to create a world map in R with specific countries filled in?. In the first answer they used rworldmap fuctions to join maps, and to fill regions by category.

This is how my data looks like (shp file):

I'm trying to make a world map with a custom legend on the right side. The legend should be with the prepared text on the left and the generated numbers on the right. I tried but to no avail. I need help My code is as follows:

I would like to use the sf maps provided in some of the mapping packages such as rworldmap. I am unable though to neither color inside the geometry nor convert to multipolygon which would allow me to use the fill= argument.

I would need to draw, in R the map of the European Union and a shaded circle that overlaps it. The circle should have a center at a point with known longitude and latitude and a predetermined radius.

First, I can't even draw the map, even though the code doesn't throw out any errors. The code is:

I'm plotting a Europe map as follows:

I'm creating a map and want to plot/display this map in RShiny. The map is created by:

I create a map of Europe with ggplot(). In addition, I have average prices for some countries, whereby the countries for which there is an average are colored differently (depending on the level of the average), all other countries are colored gray by default.

My code for this looks like this:

I have a raster image that I would like to plot with a world map overlay in R. I am able to plot both the raster image and map overlay, but the x and y limits specified for the raster plot are not what I specified, leaving an overhang outside of the raster bounds that I do not want displayed on my map.

Here is my code: