[R] Basic ggplot question

[Santosh Srinivas]

Thanks Baptiste that works but keen to know if there are other ways.

I'm new to ggplot .. just wondering if there is no easy way to overlay the
new data i.e vol over my Close chart?


-----Original Message-----
From: baptiste auguie [mailto:baptiste.auguie at googlemail.com] 
Sent: 10 January 2011 18:59
To: Santosh Srinivas
Cc: r-help at r-project.org
Subject: Re: [R] Basic ggplot question

Hi,

Try this,

m = melt(dat, id="Date")
head(m)

qplot(Date, value, data=m, colour=variable, geom="line")

ggplot(m) + facet_grid(variable~., scales="free_y") +
  geom_path(aes(Date, value))


HTH,

baptiste

On 10 January 2011 14:12, Santosh Srinivas <santosh.srinivas at gmail.com>
wrote:
> Hello R-Group,
>
> I am trying plotting simple time-series with ggplot2 because the output
> looks better and I've heard its richer in features.
>
> I have the following dataset.
>> dput(dat)
> structure(list(Date = structure(c(14970, 14971, 14972, 14973,
> 14974, 14977, 14978, 14979, 14980, 14981), class = "Date"), Close =
> c(5998.1,
> 5996, 6060.35, 6101.85, 6134.5, 6157.6, 6146.35, 6079.8, 6048.25,
> 5904.6), vol = c(0.154535414667409, 0.151830297402932, 0.140309395040681,
> 0.136253183394409, 0.137108091041075, 0.137109537791588,
0.137664093371524,
> 0.141313700592413, 0.123866294210121, 0.139356235990631)), .Names =
> c("Date",
> "Close", "vol"), row.names = c("4905", "4906", "4907", "4908",
> "4909", "4910", "4911", "4912", "4913", "4914"), class = "data.frame")
>
> I can get one plot using:
> qplot(Date, Close, data=dat,geom="line")
>
> How can I plot both Close and vol on the same chart?
>
> Been breaking my head on this ... thanks for your help in advance.
>
> Regards,
> S
>
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