多點時間序列

Question

我想繪製多個y值作爲單個x值（日期）的點。每個時間點具有可變數量的y值。它與在同一圖上繪製多條線不同，因爲時間t處的點與時間t + 1處的點之間的關係是未知的。我也不想要一個boxplot。我想清楚地看到每一點。當我試圖繪製這個，R想重新組織X軸，拋出我的時間系列。誰能幫忙？

伊恩

windows() 
plot(mu ~ date, xlab="Date", ylab="Mean Length (um)") 
axis(1, date, format(date, "%b %d")) 


site date mu 
eldo pipe 9/3/2012 89.1365072 
eldo pipe 9/3/2012 125.235052 
eldo pipe 9/3/2012 135.153096 
eldo pipe 9/3/2012 113.847438 
eldo pipe 9/3/2012 89.732397 
eldo pipe 9/3/2012 111.071991 
eldo pipe 9/3/2012 122.437213 
eldo pipe 9/3/2012 134.821803 
eldo pipe 9/3/2012 110.687526 
eldo pipe 9/3/2012 100.9783758 
eldo pipe 9/3/2012 131.321202 
eldo pipe 9/3/2012 123.56519  
eldo pipe 9/3/2012 136.517857 
eldo pipe 9/26/2012 96.0162055 
eldo pipe 9/26/2012 102.1533248 
eldo pipe 9/26/2012 119.846013 
eldo pipe 9/26/2012 130.1969079 
eldo pipe 9/26/2012 135.3865 
eldo pipe 9/26/2012 140.3697581 
eldo pipe 9/26/2012 108.4733771 
eldo pipe 9/26/2012 122.834203 
eldo pipe 9/26/2012 137.80903 
eldo pipe 9/26/2012 120.292561 
eldo pipe 9/26/2012 133.746842 
eldo pipe 11/2/2012 106.26084 
eldo pipe 11/2/2012 125.249647 
eldo pipe 11/2/2012 129.028305 
eldo pipe 11/2/2012 137.932549 
eldo pipe 11/2/2012 147.8790966 
eldo pipe 11/2/2012 116.63048 
eldo pipe 11/2/2012 121.930454 
eldo pipe 11/2/2012 86.85304 
eldo pipe 11/2/2012 130.63338 
eldo pipe 11/2/2012 146.3816077 
eldo pipe 11/2/2012 84.58692 
eldo pipe 11/2/2012 103.925925 
eldo pipe 11/2/2012 111.2692061 
eldo pipe 11/2/2012 120.093059 
eldo pipe 11/2/2012 131.782033 

Answer 1

您可以使用一個抖動stripchart看到每次的所有點。

> par(mar = c(5, 5, 4, 2)) 
> stripchart(mu ~ date, data = dat, method = "jitter", pch = 1, las = 1)