R help - Jul 2012 - A graph with a positive y-axis intercept

Dear all,
 
I have a challenge with a supposedly simple graph (a scatter). I wanted to use R
to create a plot/graph with a positive y-axis intercept but it does not seem to
give me what I expect to see. As an example, I used the following values
 
> X<- c(0, 4, 8, 11)
> Y<- c(8, 12, 15, 22)
then I used the plot function in the base package
 
> plot(X, Y)
 
This gave me a graph which might be mistaken to be starting from the origin, and
yet, using the same numbers in Excel, and plotting them using the scatter
option, I get a graph which clearly has a positive y-axis intercept.
Please help.
 
Lexi
	[[alternative HTML version deleted]]

Your question is not entirely clear to me, but I think you might want:

plot(X, Y, xlim=c(0, 25), ylim=c(0, 25))

Sarah

On Thu, Jul 19, 2012 at 5:31 PM, Lekgatlhamang, lexi Setlhare
<lexisetlhare at yahoo.com> wrote:
> Dear all,
>
> I have a challenge with a supposedly simple graph (a scatter). I wanted to
use R to create a plot/graph with a positive y-axis intercept but it does not
seem to give me what I expect to see. As an example, I used the following values
>
>> X<- c(0, 4, 8, 11)
>> Y<- c(8, 12, 15, 22)
>
> then I used the plot function in the base package
>
>> plot(X, Y)
>
> This gave me a graph which might be mistaken to be starting from the
origin, and yet, using the same numbers in Excel, and plotting them using the
scatter option, I get a graph which clearly has a positive y-axis intercept.
> Please help.
>
> Lexi
-- 
Sarah Goslee
http://www.functionaldiversity.org

HI,

I guess you wanted to change the scale of Y-axis:

?plot(X,Y,ylim=c(0,25))

A.K.



----- Original Message -----
From: "Lekgatlhamang, lexi Setlhare" <lexisetlhare at yahoo.com>
To: "r-help at stat.math.ethz.ch" <r-help at stat.math.ethz.ch>
Cc: 
Sent: Thursday, July 19, 2012 5:31 PM
Subject: [R] A graph with a positive y-axis intercept

Dear all,
?
I have a challenge with a supposedly simple?graph (a scatter). I wanted to use R
to create a plot/graph with a positive y-axis intercept but it does not seem to
give me what I expect to see. As an example, I used the following values
?
> X<- c(0, 4, 8, 11)
> Y<- c(8, 12, 15, 22)
then I used the plot function in the base package
?
> plot(X, Y)
?
This gave me a graph which?might be mistaken?to be starting from the origin, and
yet, using the same numbers in Excel, and plotting them using the scatter
option, I get a graph which clearly has a positive y-axis intercept.
Please help.
?
Lexi
??? [[alternative HTML version deleted]]


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