Re: [R] Advise in R- plotting graphs

From: jim holtman <jholtman_at_gmail.com>
Date: Fri, 23 May 2008 09:00:51 -0400

try this:

x <- matrix(runif(15, 100, 300), ncol=3) plot(x[,1], x[,2], type='l')
points(x[5,1], x[5,2], pch=17, cex=3, col='red') # plot point #5

On Fri, May 23, 2008 at 8:50 AM, Jason Lee <huajie.lee_at_gmail.com> wrote:

> Hi
>
> I have a data table matrix,"data" which looks like below:-
> V1 V2 V3
> 1 -6382.719 -1096.554 6998994
> 2 -some values-
> 3 -some values-
> 4 -some values-
> 5 -some values-
>
> Querying dim of "data" gives me 3 columns and 5 rows.
>
> And currently I want to plot "V1" against "V2" with the condition that I
> want to mark(color) the point(row 5) on the graph. This is so i could see
> some triangle shape thing on the graph for row 5.
>
> I couldnt recall how I could use repo() to change the line 5 to some value
> to differentiate with others. And then using PCH for the color.
>
> Please advise. Thanks.
>
> -jason
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html<http://www.r-project.org/posting-guide.html>
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

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Received on Fri 23 May 2008 - 13:08:52 GMT

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