[R] Plot only a portion of a record

[Greg Snow]

If you use the formula method for plot then you can use the subset
argument, for example:

 plot(Sepal.Width ~ Sepal.Length, data=iris)
 plot(Sepal.Width ~ Sepal.Length, data=iris, subset=Species=='setosa')

On Mon, Jan 13, 2014 at 5:39 PM, Janet Choate <jsc.eco at gmail.com> wrote:
> Hi R community,
> i have a data frame of streamflow for 23 years, i.e.
>
>         date year month day   wy  yd wyd      modQ
> 1 1965-10-01 1965    10   1 1966 274   1 0.3341630
> 2 1965-10-02 1965    10   2 1966 275   2 0.3223247
> 3 1965-10-03 1965    10   3 1966 276   3 0.3109057
>
> i only want to plot 1 of the years, along with the date.
> i can accomplish this with:
>
> plot(mod.sage$date[mod.sage$wy==1976],mod.sage$modQ[mod.sage$wy==1976],
> type="l")
>
> however, this is a bit long and clunky. is there a way to plot just a
> portion of the full data record without creating a whole new object with
> subset?
>
> thank you for any help!
> Janet
>
>         [[alternative HTML version deleted]]
>
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-- 
Gregory (Greg) L. Snow Ph.D.
538280 at gmail.com