Graphing question(basic)

Apology. Will investigate ?segments. But this is simpler than that ?


think<-20

xc<-c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
34, 35, 36, 37, 38, 39, 40)
yc<-c(2.2, 2.28454054054054, 2.37536982774792, 2.47313421094031,
2.5785575746323, 2.6924505136953, 2.8157201615705, 2.94938049983818,
3.09456286072372, 3.25252617706843, 3.42466633005651, 3.61252368944728,
3.8177876360978, 4.0422965148466, 4.28803111715535, 4.55709949144067,
4.85171070979966, 5.17413530104881, 5.5266505359318, 5.91146976820772,
6.33065670052978, 6.78602775401095, 7.27904848896425, 7.81073282553444,
8.38155598805605, 8.99139286720872, 9.63949219065441, 10.3244932533533,
11.0444863687371, 11.7971117346767, 12.5796855744434, 13.3893386735135,
14.2231516747487, 15.0782737166279, 15.9520153622441, 16.8419119612243,
17.7457583253788, 18.6616190047916, 19.5878202092552, 20.5229296995423
)

plot(xc, yc, type="l", ylim=c(0,50), xlim=c(0,50), lwd=2, xlab="M",
ylab="seconds")
abline(a=-20, b=1.00, lty="dashed",  col="red")
abline( 2.2, 0, lty="dashed",  col = "red")

Thanks,
Mohan

-----Original Message-----
From: R. Michael Weylandt [mailto:michael.weylandt at gmail.com]
Sent: Tuesday, August 14, 2012 11:49 AM
To: Mohan Radhakrishnan
Cc: r-help at r-project.org
Subject: Re: [R] Graphing question(basic)

Hi Mohan,

Your code isn't reproducible as is: see

http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reprodu
cible-example

for more information on how you can help us help you.

That said, I think you are looking for the ?segments function.

Cheers,
Michael

On Tue, Aug 14, 2012 at 2:13 AM, Mohan Radhakrishnan <mohanr at fss.co.in>
wrote:

Hi,



plot(xc, yc, type="l", ylim=c(0,50), xlim=c(0,50), lwd=2, xlab="M",
ylab="seconds")

abline(a=-think, b=cpustime, lty="dashed",  col="red")

abline( 2.2, 0, lty="dashed",  col = "red")



This draws a response time curve an asymptote and a horizontal line.

How

do I draw a line from the intersection of the asymptote and the
horizontal to intersect the y-axis ? I also want to calculate the

value

at this y-axis intersection point.



Thanks,

Mohan



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