我有以下功能:
fx <- function(x) {
if(x >= 0 && x < 3) {
res <- 0.2;
} else if(x >=3 && x < 5) {
res <- 0.05;
} else if(x >= 5 && x < 6) {
res <- 0.15;
} else if(x >= 7 && x < 10) {
res <- 0.05;
} else {
res <- 0;
}
return(res);
}
我怎样才能绘制它CDF https://en.wikipedia.org/wiki/Cumulative_distribution_function区间上的函数[0,10]
?
Try
fx <- Vectorize(fx)
grid <- 0:10
p <- fx(grid)
cdf <- cumsum(p)
plot(grid, cdf, type = 'p', ylim = c(0, 1), col = 'steelblue',
xlab = 'x', ylab = expression(F(x)), pch = 19, las = 1)
segments(x0 = grid, x1 = grid + 1, y0 = cdf)
segments(x0 = grid + 1, y0 = c(cdf[-1], 1), y1 = cdf, lty = 2)
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