[英]How to add multiple straight lines in a multi plot.zoo
I have multiple time series data plots and I need an horizontal line in each plot but with different horizontal values (es. 1st plot: h=50
, 2nd plot: h=48
...). 我有多个时间序列数据图,我需要在每个图中有一条水平线,但水平值不同(例如,第一个图: h=50
,第二个图: h=48
......)。
I tried abline(h=50...
and I get the horizontal line in each plot. I tried abline(h=c(50,48...
and I get multilple horizontal lines in each plot. 我尝试了abline(h=50...
我得到了每个图中的水平线。我尝试了abline(h=c(50,48...
我在每个图中得到多条水平线。
I can't figure out how to get the plot.zoo index in order to plot h=50
in the 1st plot, h=48
in the 2nd plot and so on. 我无法弄清楚如何获得plot.zoo指数以便在第一个图中绘制h=50
,在第二个图中h=48
,依此类推。
library(xts)
data(sample_matrix)
x <- as.xts(sample_matrix)
# plot with single line
my.panel <- function(x, ...) {
lines(x, ...)
abline(h=50, col = "red", lty="solid", lwd=1.5 )
}
plot.zoo(x, main="title",
plot.type="multiple", type="o", lwd=1.5, col="blue",
panel=my.panel)
# plot multiple lines in all plots
my.panel <- function(x, ...) {
lines(x, ...)
abline(h=c(50,50,48,50), col = "red", lty="solid", lwd=1.5 )}
plot.zoo(x, main="title",
plot.type="multiple", type="o", lwd=1.5, col="blue",
panel=my.panel)
To customize single panels in a multipanel plot is not thoroughly described in the actual ?plot.zoo
text. 在实际的?plot.zoo
文本中没有详细描述在多面板图中自定义单个面板。 In the 'Details' section you find: 在“详细信息”部分中,您会发现:
"In the case of a custom panel the panel
can reference parent.frame$panel.number
in order to determine which frame the panel is being called from. See examples.". “在自定义面板的情况下, panel
可以引用parent.frame$panel.number
以确定从哪个帧调用面板。参见示例。” And there are quite a few examples. 还有很多例子。 Using them as template, I found that this could be a way to call separate panels, and draw a separate hline
in each. 使用它们作为模板,我发现这可以是一种调用单独面板的方法,并在每个面板中绘制一个单独的hline
。
Update. 更新。 Thanks to @G. 感谢@G。 Grothendieck for an edit that made the code much cleaner! Grothendieck进行编辑,使代码更清晰!
# create values for hline, one for each panel
hlines <- c(50, 50, 48, 50)
# panel function that loops over panels
my.panel <- function(x, ...) {
lines(x, ...)
panel.number <- parent.frame()$panel.number
abline(h = hlines[panel.number], col = "red", lty = "solid", lwd = 1.5)
}
plot.zoo(x, main = "title", type = "o", lwd = 1.5, col = "blue", panel = my.panel)
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