Shades of a table column, around a middle — shade

5 shades of red below the middle and 5 of green above it, up to the largest distance from it, and no color near it, for DT::formatStyle().

Usage

shade_interval(values, middle)

Arguments

values: The numbers of the column, or of the columns that share the scale.
middle: The value that gets no color, such as 0 for changes or 50 for a share in percent.

Value

The JavaScript of DT::styleInterval().

Examples

golemstockindices:::shade_interval(c(-3, 1, 2.5), 0)
#> [1] "isNaN(parseFloat(value)) ? '' : value <= -2.7 ? \"rgba(220,53,69,0.750)\" : value <= -2.1 ? \"rgba(220,53,69,0.600)\" : value <= -1.5 ? \"rgba(220,53,69,0.450)\" : value <= -0.9 ? \"rgba(220,53,69,0.300)\" : value <= -0.3 ? \"rgba(220,53,69,0.150)\" : value <= 0.3 ? \"rgba(25,135,84,0.000)\" : value <= 0.9 ? \"rgba(25,135,84,0.150)\" : value <= 1.5 ? \"rgba(25,135,84,0.300)\" : value <= 2.1 ? \"rgba(25,135,84,0.450)\" : value <= 2.7 ? \"rgba(25,135,84,0.600)\" : \"rgba(25,135,84,0.750)\""
#> attr(,"class")
#> [1] "JS_EVAL"