Suggestion: sd style labels
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Description
@mtennekes I have three ideas for improvement of the sd style. Let me know what you think about it.
- Automatic labels for this style (how much the values deviates from the mean) (see image at the bottom)
- Middle class containing the values around the mean (e.g. -0.5 sd to 0.5 sd). Right now, there are two middle class - one below and one above the mean.
- Automatic diverging palette when the
sdstyle is used.
library(tmap)
library(spData)
mean(world$lifeExp, na.rm = TRUE)
#> [1] 70.85439
sd(world$lifeExp, na.rm = TRUE)
#> [1] 8.209522
tm_shape(world) +
tm_polygons("lifeExp", style = "sd")
#> Linking to GEOS 3.8.1, GDAL 3.0.4, PROJ 6.3.2
Created on 2020-10-09 by the reprex package (v0.3.0)
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- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the existing implementation of tm_polygons() with style = "sd". Clarify the intended behavior for automatic labels, a single middle class around the mean, and an automatic diverging palette before locating the relevant code and tests. Done means the agreed behavior is implemented and verified for the example using world$lifeExp.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- r
- Domain
- data-visualization
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100