[R] Qurey : How to add trendline( st. line) in Graph
priti desai
priti.desai at kalyptorisk.com
Mon Jun 19 12:52:24 CEST 2006
How to add trendline (i.e. straight line passing through maximum points)
in graph.
I have worked on the data given below.
Please tell me how to add trendline in the graph.
The script is as follows
=================================== start
====================================================
# The data is as follows
data <- c( 0.01, 0.02, 0.04, 0.13, 0.17 , 0.19 , 0.21 , 0.27 , 0.27 ,
0.28, 0.29, 0.37,
0.41, 0.49, 0.51, 0.52, 0.54, 0.57, 0.62, 0.63, 0.68,
0.73, 0.74, 0.79,
0.81, 0.81, 0.82, 0.86, 0.94, 0.96, 1.02, 1.10, 1.10,
1.20, 1.29, 1.36,
1.40, 1.41, 1.44, 1.45, 1.62, 1.67, 1.69, 1.78, 1.82,
2.11, 2.13, 2.14,
2.24, 2.29, 2.34, 2.40, 2.46, 2.70, 2.83, 2.98, 3.00,
3.30, 3.53, 3.70,
3.86, 3.90, 3.91, 3.98, 5.01, 5.23, 6.05, 6.12, 10.41,
10.73)
# P-P plot
average <- mean(data)
lambda <- (1/average)
e <- c(1:70)
f <- c((e-.5)/70)
Fx <- c(1 - exp(-lambda*data))
g <- sort(Fx)
plot(f,g)
===================================== end
====================================================
Awaiting your positive reply.
Regards.
Priti.
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