Plotting symbols
Recall that plotly allows you to customize the plotting symbols used through the symbols argument to add_markers(). Both numeric and character specifications of symbols are permitted. For example, 100 denotes an open circle which can also be specified as "circle-open".
To manually specify the scale for, say, three levels you can specify symbols = c("circle", "triangle", "x") to ensure that the groups are represented by circles, triangles, and x's, in that order.
Here's the full list of valid plotting symbols for your reference.
In this exercise, you'll change the plotting symbols for the income categories.
plotly and the happy data set have already been loaded for you.
This exercise is part of the course
Intermediate Interactive Data Visualization with plotly in R
Exercise instructions
- Change the plotting symbols for
incomecategories according to the following scheme: - low:
"circle-open"; lower-middle:"square-open"; upper-middle:"star-open"; high:"x-thin-open"
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Fill in the specified plotting symbols
happy %>%
plot_ly(x = ~life.expectancy, y = ~happiness) %>%
add_markers(symbol = ~income, symbols = c(___, ___, ___, ___))