Re: [R] displaying label meeting condition (i.e. significant, i..e p value less than 005) in plot function

From: Jorge Ivan Velez <jorgeivanvelez_at_gmail.com>
Date: Sun, 06 Mar 2011 00:21:31 -0500

Hi Umesh,

You can try something along the lines of:

d <- dataf[dataf$p < 0.05, ] # p < 0.05 with(d, plot(xvar, p, col = 'white'))
with(d, text(xvar, p, name, cex = .7))

HTH,
Jorge

On Sat, Mar 5, 2011 at 12:29 PM, Umesh Rosyara <> wrote:

> Dear R users,
>
> Here is my problem:
>
> # example data
> name <- c(paste ("M", 1:1000, sep = ""))
> xvar <- seq(1, 10000, 10)
> set.seed(134)
> p <- rnorm(1000, 0.15,0.05)
> dataf <- data.frame(name,xvar, p)
> plot (dataf$xvar,p)
> abline(h=0.05)
>
> # I can know which observation number is less than 0.05
> which (dataf$p < 0.05)
> [1] 12 20 80 269 272 338 366 368 397 403 432 453 494 543 592 691 723 789
> 811
> [20] 854 891 931 955
>
> I want to display (label) corresponding names on the plot above:
> means that 12th observation M12, 20th observation M20 and so on. Please
> note
> that I have names not in numerical sequience (rather different names), just
> provided for this example to create dataset easily.
>
> Thanks in advance
>
> Umesh R
>
>
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>
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>

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