segments could not draw line in log plot

abline(v=x) is better for my charts.
Thanks Christian.

Regards,
Winds
 
 
------------------ ???? ------------------
???: "Christian Prinoth"<Christian.Prinoth at epsilonsgr.it>;
????: 2008?11?28?(???) ??0:56
???: "Wind"<windspeedo at qq.com>; "r-sig-finance"<r-sig-finance at stat.math.ethz.ch>; 

??: RE: [R-SIG-Finance] segments could not draw line in log plot

 
abline(v=x)
where x is the x-value for the vertical line

Christian Prinoth <cp at epsilonsgr.it>
Epsilon SGR
+39-02-88102355

-----Original Message-----
From: r-sig-finance-bounces at stat.math.ethz.ch
[mailto:r-sig-finance-bounces at stat.math.ethz.ch] On Behalf Of Wind
Sent: 27 November, 2008 17:44
To: r-sig-finance
Subject: [R-SIG-Finance] segments could not draw line in log plot

The following code show the vertical red line successfully.
y<-1:100
plot(y)
segments(50,0,50,100,col='red')

But, if the y axis is changed to log axis, the red line could
not be drawn.
y<-1:100
plot(y,log='y')
segments(50,0,50,100,col='red')

I wonder whether there is some method to draw a vertical line
in a log-axis plot?
Thanks in advance.

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