bar
A length in one dimension, starting at a common baseline; as in a bar chart.
If scaleX is in scope, the bar will be oriented horizontally; vertically if scaleY is in scope.
One of scaleX or scaleY must be in scope, but not both.
Attributes
map-length="lengthDim"
The dimension of the data which sets the width or height of the bar.
Recommended Usage
Bar charts are a familiar friend, mapping a single quantitative measure to the length of bars that share a common baseline. Since people read the value of a bar from its length, an honest bar chart must always start at 0. If the variation between data is too small to see on a bar chart that starts at zero, consider using a dotplot instead.
While most bar charts are oriented vertically, they work just as well when oriented horizontally. In left-to-right and right-to-left reading languages, orienting the bars horizontally will both provide more room for labels and make them more readable.