我查阅了poweRlaw使用的plot函数的源代码并进行了修改:
lines_ <- function (x, y, ...)
{
.local <- function (x, cut = FALSE, draw = TRUE, ...)
{
xmin = x$getXmin()
cut_off = cut * xmin
x_values = x$dat
if (!cut)
x$setXmin(min(x_values))
y = dist_data_cdf(x, lower_tail = FALSE, xmax = max(x_values) + 1)
cut_off_seq = (x_values >= cut_off)
x_axs = x_values[cut_off_seq]
if (is(x, "discrete_distribution"))
x_axs = unique(x_axs)
x$setXmin(xmin)
x = x_axs
if (draw)
lines(x, y, ...)
invisible(data.frame(x = x, y = y))
}
.local(x, ...)
}
#----------------------------------------------------------
points_ <- function (x, y, ...)
{
.local <- function (x, cut = FALSE, draw = TRUE, ...)
{
xmin = x$getXmin()
cut_off = cut * xmin
x_values = x$dat
if (!cut)
x$setXmin(min(x_values))
y = dist_data_cdf(x, lower_tail = FALSE, xmax = max(x_values) + 1)
cut_off_seq = (x_values >= cut_off)
x_axs = x_values[cut_off_seq]
if (is(x, "discrete_distribution"))
x_axs = unique(x_axs)
x$setXmin(xmin)
x = x_axs
if (draw)
points(x, y, ...)
invisible(data.frame(x = x, y = y))
}
.local(x, ...)
}
函数lines_ 和points_
- 绘制与
poweRlaw 包的plot 函数相同的图形,但是
- 表现得像标准的
lines 和 points 函数,因为它们不会破坏当前图形。
首先 m_bs 和 'm_eq' 分开:
> plot(m_bs, lwd=9, col="black")
> lines_(m_bs, lwd=5, col="green")
> plot(m_eq, lwd=9, col="black")
> lines_(m_eq, lwd=5, col="blue")
这些图表的 x 范围不重叠。因此, xlim必须适当地选择同一图片中的两个图。
> plot( m_eq, lwd=8, col="black",
+ xlim=c(min(m_bs$dat,m_eq$dat),max(m_bs$dat,m_eq$dat)))
> lines_(m_eq, lwd=5, col="blue")
> points_(m_bs,lwd=8,col="black")
> lines_(m_bs, lwd=5, col="green")
>