[英]How to plot a density map between two lines with ggplot2?
當然。 也許:
library(tidyverse)
expand.grid(x = seq(0, 1, .001), # make a grid of x and y values
y = seq(0, 1, .001)) %>%
filter(y < x, y > x ^ 2) %>% # filter to rows between curves
ggplot(aes(x, y, fill = x + y)) +
geom_raster() +
stat_function(fun = identity, color = 'red') + # add y = x
stat_function(fun = function(x){x^2}, color = 'red', linetype = 'dashed') +
scale_fill_gradient(low = 'black', high = 'white') +
coord_equal()
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