You could also use a function like this to transform a number x into your
"beautiful" notation, where x is the number and digits is the number of digits
you would like to see after the decimal. Then you could use the axis and labels
syntax suggested by Iain, as such:
sciNotation <- function(x, digits = 1) {
if (length(x) > 1) {
return(append(sciNotation(x[1]), sciNotation(x[-1])))
}
if (!x) return(0)
exponent <- floor(log10(x))
base <- round(x / 10^exponent, digits)
as.expression(substitute(base %*% 10^exponent,
list(base = base, exponent = exponent)))
}
plot(1:1000, axes = FALSE, type = "l", frame.plot = TRUE)
axis(1, at = axTicks(1), label = sciNotation(axTicks(1), 1))
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of IAIN GALLAGHER
Sent: Friday, January 13, 2006 8:09 AM
To: Oddmund Nordgård
Cc: [email protected]
Subject: Re: [R] Scientific notation in plots
try something like this:
>axis(side=2, at=c(0, 5e+5, 1.5e+6, 2.5e+6),
labels=expression(0, 5%*%10^5, 1.5%*%10^6, 2.5%*%10^6)
it will place your 5e+5, 1.5e+6, 2.5e+6 as scientific
notation at the correct positions on the y axis. the
key is the "labels=expression...." part.
Cheers
iain
--- Oddmund Nordgård <[EMAIL PROTECTED]> wrote:
>
> Is it possible to use scientific notation of numbers
> on the axis of plots
> without using the xEy notation. That means: a
> beatiful 1x10^3 instead of 1E3.
> Logarithmic scale, in my case.
>
> Thank you very much!
>
> Oddmund
>
> ******************************************
>
> Oddmund Nordgård
>
> Department of Haematology and Oncology
> Stavanger University Hospital
> P.O. Box 8100
> 4068 STAVANGER
> Phone: 51 51 89 34
> Email: [EMAIL PROTECTED]
>
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>
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