R- adding p-value and tau to plots

Asked Aug 10 '15 at 19:21

Active Aug 10 '15 at 19:35

Viewed 401 times

I have made a scatter plot with a Loess curve using the following code. I ran the MannKendall test on this data and want to display the tau and p-value on the graph.

ggplot(LITTLEC.S, aes(Date, TP)) + 
  geom_point(color="light sea green", size = 4, alpha = 1/2) + 
  ggtitle("Little Carnelian Lake Total Phosphorus") + 
  geom_smooth(method="loess") + 
  ylab("TP, mg/L") + theme_bw()

MannKendall(LITTLE.C$TP)

edited Aug 10 '15 at 19:35

Jota

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asked Aug 10 '15 at 19:21

Katie

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how do you want to display the tau and p-value? can you provide some sample data, see http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example/5963610#5963610 – mts Aug 10 '15 at 19:26
just use `geom_annotate` – Rorschach Aug 10 '15 at 19:41
rather `annotate(geom = "text", ...)`. – Gregor Thomas Aug 10 '15 at 19:43
Per @Gregor, see [this help page](http://docs.ggplot2.org/0.9.3/annotate.html) for details. – ulfelder Aug 10 '15 at 20:26

R- adding p-value and tau to plots

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