Message-ID: <CDBC8266-E906-46E4-8BDC-7C01BFF3D1E9@comcast.net>
Date: 2011-12-28T14:39:45Z
From: David Winsemius
Subject: transparency using plot+points with sp classes
In-Reply-To: <CAErHZW07B0tjR_GjAxsAKkFq1hvp=dWwB19A6ZcysF6wo-_AMQ@mail.gmail.com>
On Dec 28, 2011, at 7:13 AM, Ana wrote:
> How can I make one point graphics with transparency
>
> These are all sp classes:
>
> plot(polygons_area,axes=TRUE,asp=1.5,main="Title",xlab="Latitude",
> ylab="Longitude")
> points(observations2000,type = "p",pch=21,col="green")
> points(observation1999,type = "p",pch=21,col="blue")
> points(reference.points,type = "p",pch=21,col="red")
>
> how can I add transparency to one of the point graphics, for example
> points(observation1999,type = "p",pch=21,col="blue") ?
Read the Details section of :
?rgb
--
David Winsemius, MD
West Hartford, CT