R help - Nov 2008 - Time plots

Dear all, 
I want to do some time plots and actually the dates are in the format of
dd/mm/yyyy. So first I input my dataframe in R in a csv form. What I do is
 
DF<-read.csv("C:/Documents and Settings/DF.csv")
DATE<-as.Date(DATE, "%d/%m/%Y")  # to tell R that DATE column is
indeed dates
with(DF, plot(DATE,pH))
 
Until here it works fine, but I have the graph plotting only the points. What I
want is to have a line (join these points) so to have a time plot. I have tried
different commands such as lines(DATE,pH) or with(DF, lines(DATE,pH) but nothing
works.
 
What can I do?
 
Yours
Lathouri Maria

	[[alternative HTML version deleted]]

try

plot(DATE, pH, type='l')

On Mon, Nov 17, 2008 at 10:30 AM, Lathouri, Maria
<m.lathouri06 at imperial.ac.uk> wrote:
> Dear all,
> I want to do some time plots and actually the dates are in the format of
dd/mm/yyyy. So first I input my dataframe in R in a csv form. What I do is
>
> DF<-read.csv("C:/Documents and Settings/DF.csv")
> DATE<-as.Date(DATE, "%d/%m/%Y")  # to tell R that DATE column
is indeed dates
> with(DF, plot(DATE,pH))
>
> Until here it works fine, but I have the graph plotting only the points.
What I want is to have a line (join these points) so to have a time plot. I have
tried different commands such as lines(DATE,pH) or with(DF, lines(DATE,pH) but
nothing works.
>
> What can I do?
>
> Yours
> Lathouri Maria
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?

On Mon, 17 Nov 2008 15:30:14 -0000 "Lathouri, Maria"
<m.lathouri06 at imperial.ac.uk> wrote:

LM> I want to do some time plots and actually the dates are in the
LM> format of dd/mm/yyyy. So first I input my dataframe in R in a csv
LM> form. What I do is DF<-read.csv("C:/Documents and
Settings/DF.csv")
LM> DATE<-as.Date(DATE, "%d/%m/%Y")  # to tell R that DATE
column is
LM> indeed dates with(DF, plot(DATE,pH))

Use a time series class for your data. Then you will get plots with
lines. Have a look at the zoo package and/or ?ts

Stefan

Lathouri, Maria <m.lathouri06 <at> imperial.ac.uk> writes:

[...]
> Until here it works fine, but I have the graph plotting only the points.
What
I want is to have a line (join
> these points) so to have a time plot. I have tried different commands such
as
lines(DATE,pH) or with(DF,
> lines(DATE,pH) but nothing works. 
> 
> What can I do?
[...]


plot(DATE,pH, type="l")

This should do it.

when you look into the plot-help-pages,
then you can see a lot of plotting-types.

with type "p" it plots points (default)
with type "l" it plots lines
with type "b" it plots lines and points

Ciao,
   Oliver