Re: [R] Why does plot() ignore the data type for axis labels?

From: Mark Difford <mark_difford_at_yahoo.co.uk>
Date: Tue, 19 Feb 2008 13:08:30 -0800 (PST)

Hi Stiffler,

>> I was wondering why the plot() command ignores the datatype when >> displaying axis labels...

plot() doesn't ignore the datatype:

> x <- as.integer(c(1,2,3))
> y <-x
> typeof(x)
[1] "integer"
> mode(x)

[1] "numeric"

plot(x,y) calls xy.coords(), which recasts x as: x = as.double(x), which is fine, since x is (also/primarily) numeric.

???

See ?double, sub: "Note on names".

HTH, Mark.

Stiffler wrote:
>
> Hello,
>
> I was wondering why the plot() command ignores the datatype when
> displaying axis labels. More specifically, if the data points are
> integers then the axis labels should intuitively also be integers, right?
>

>> x <- as.integer(c(1,2,3))
>> y <-x
>> typeof(x)

> [1] "integer"
>> plot(x,y)
>>

>
> The axis labels are 1.0, 1.5, 2.0, 2.5, 3.0 but if the integer type were
> taken into account they would be 1, 2, 3.
>
> PS what's the right way to get integer labels?
> Z.
>
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