I am looking to add subscripts to a chart title in ggplot, to look something like:

I have a dataset:

I want to generate a plot which keeps all the colors in the legend, even for a subset of the data. When i create a reproducible example it works, and i am going out of my mind trying to work out what i am missing. Below is my working reproducible example and a dput of my code that won’t work. Appreciate any help correcting this.

Following this question (How to use average value in geom_line?), how can I change this graph with two geom_lines: one representing the averaged low temperatures from 20:00 to 08:00 and the other representing the averaged high temperatures from 08:01 to 19:59?

I need to replace very long axis labels in a ggplot with more informative names stored in the dataframe from which the plot is drawn.
For some reasons (see Replacing axis labels with scale_x_discrete) ggplot fails to do so.

I am generating combination of stacked bar and line using two functions. I want both line and stacked colors to be present on the legend. I’ve taken a look at the examples on stackoverflow, but can’t make them work.

I want the graph’s title to show “the title is m0”, in which 0 is placed as a subscript next to “m”. I am using the expression() but it works without other characters, while fail to make it a subscript when other characters are present. How can we fix this?

I have below histogra musing ggplot

I can successfully add a geom_segment line with arrows to a plot when it is displayed singly,

I have below ggplot