how to plot annual values directly

Hi

Other option is aggregate or ave, depending on how do you want to plot mean/sum values.

You should think about posting an example of what do you have and what do you want to achieve (at least partly). Without that we are just guessing your real intention.

Cheers
Petr

From: Ulrik Stervbo [mailto:ulrik.stervbo at gmail.com]
Sent: Wednesday, August 3, 2016 9:03 PM
To: lily li <chocold12 at gmail.com>; PIKAL Petr <petr.pikal at precheza.cz>
Cc: R mailing list <r-help at r-project.org>
Subject: Re: [R] how to plot annual values directly

You could use dplyr:

library(plyr)
ddply(df, .variables = "year", summarise, mean.precip = mean(precip))

Hope this helps
Ulrik

I meant that my dataframe has daily data, but how to plot annual mean/sum
directly? Thanks.

Hi

What do you mean to plot annual mean/sum directly? You can compute it by
aggregate function and add it to your plot, but I am not sure if it is
enough direct.

Cheers
Petr

-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org<mailto:r-help-bounces at r-project.org>] On Behalf Of lily li
Sent: Tuesday, August 2, 2016 8:10 PM
To: R mailing list <r-help at r-project.org<mailto:r-help at r-project.org>>
Subject: [R] how to plot annual values directly

Hi R users,

I have a dataframe, with daily precipitation data, is it possible to

plot annual

mean or annual sum values directly? Thanks for your help.

df
year   month   day   precip       time
2010     1          1        0.5     2010-01-01
2010     1          2        0.8     2010-01-02
2010     1          3        1.0     2010-01-03
2010     1          4        0.9     2010-01-04
...

fig1 = ggplot()+ geom_path(data=df, aes(x=time, y= precip)
show(fig1)

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