[R] Plot only a portion of a record

[arun]

Hi Janet,

You may also check library(xts).  
mod.sage <- read.table(text="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 0.3459057
4 1965-10-04 1965    10  4 1966 277  4 0.3841630
5 1965-10-05 1965    10  5 1966 278  5 0.3423247
6 1965-10-06 1965    10  6 1966 279  6 0.3209057
7 1966-10-04 1966    10  4 1967 277  4 0.3341630
8 1966-10-05 1966    10  5 1967 278  5 0.3223247
9 1966-10-06 1966    10  6 1967 279  6 0.3109057",sep="",header=TRUE,stringsAsFactors=FALSE)

library(xts)
# xt1 <- xts(mod.sage[,-1],order.by=as.Date(mod.sage[,1]))
# plot(with(xt1["/1965"],modQ), main= "Year 1965")

xt2 <- xts(mod.sage[,-c(1:7)],order.by=as.Date(mod.sage[,1]))
plot(xt2["/1965"],main="Year 1965")
A.K.






On Monday, January 13, 2014 7:41 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

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