R help - Mar 2012 - line plot over a barplot

Dear all,

            I have data in the following format :
X-axis            Y-axis
<0                10%
0-20              20%
20-40            30%
40-60            40%
......... and so on.
 I want to plot a bar graph of the above. Also I would want to add a
trendline passing either through the center of each bar or through the top.
Is it also possible to get the r-squared and p-values for this trendline?
How do I all of the above? I would be extremely indebted by your help.
Thanks in advance


Regards,

Anupam


-- 
Graduate Student,
Laboratory of Computational Biology,
Center For DNA Fingerprinting And Diagnostics,
4-1-714 to 725/2, Tuljaguda complex
Mozamzahi Road, Nampally,
Hyderabad-500001

	[[alternative HTML version deleted]]

Hi
> 
> Dear all,
> 
>             I have data in the following format :
> X-axis            Y-axis
> <0                10%
> 0-20              20%
> 20-40            30%
> 40-60            40%
> ......... and so on.
>  I want to plot a bar graph of the above. Also I would want to add a
> trendline passing either through the center of each bar or through the 
top.

x<-letters[1:5]
y<-1:5
bb<-barplot(y, names.arg=x)
lines(bb, y)
lines(bb, y/2)
> Is it also possible to get the r-squared and p-values for this 
trendline?

summary(fit<-lm(y~bb))

Regards
Petr
> How do I all of the above? I would be extremely indebted by your help.
> Thanks in advance
> 
> 
> Regards,
> 
> Anupam
> 
> 
> -- 
> Graduate Student,
> Laboratory of Computational Biology,
> Center For DNA Fingerprinting And Diagnostics,
> 4-1-714 to 725/2, Tuljaguda complex
> Mozamzahi Road, Nampally,
> Hyderabad-500001
> 
>    [[alternative HTML version deleted]]
> 
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