Thank you.
From: Rui Barradas
Date: Monday, September 19, 2022 at 1:28 PM
To: Parkhurst, David , R-help@r-project.org
Subject: Re: [R] Converting time format
Hello,
I will run the examples below with the following data:
x <- c("12:00", "12:15", "12:30",
Thank you. I�ll see what I can do with that.
From: Rui Barradas
Date: Monday, September 19, 2022 at 1:28 PM
To: Parkhurst, David , r-help@r-project.org
Subject: Re: [R] Converting time format
Hello,
I will run the examples below with the following data:
x <- c("12:00", &q
Hello,
I will run the examples below with the following data:
x <- c("12:00", "12:15", "12:30", "12:45", "13:00", "13:15", "13:30",
"13:45", "14:00", "14:15", "14:30", "14:45", "15:00", "15:15",
"15:30", "15:45", "16:00", "16:15", "16:30", "16:45", "17:00",
"17:15", "17:30"
What is the output of
> class(b$time)
?
Also, start sending your emails in plaint text format, if possible.
On Mon, Sep 19, 2022 at 2:12 PM Parkhurst, David wrote:
>
> I have a dataframe obtained using read.csv from an excel file. Its first
> column is times, running from 18:00 to 19:30. If
I have a dataframe obtained using read.csv from an excel file. Its first
column is times, running from 18:00 to 19:30. If I want to plot other columns
against time, do I need to convert those somehow, and how would I do that?
If I run plot(b$time,b$myvar) I get a decent plot, but a friend sugg
Sure:
df.count.mon$time<-format(as.Date(paste(df.count.mon$year, df.count.mon$mon,1),
'%Y %m %d'),"%Y %m")
> df.count.mon
count year montime
1 22 2014 1 2014 01
2 12 2014 2 2014 02
...
Jim
On Thu, Feb 23, 2017 at 8:18 AM, lily li wrote:
> Yes, it is a little different. Is t
Yes, it is a little different. Is there a way to get '-mm' format?
Thanks.
On Wed, Feb 22, 2017 at 2:10 PM, Jim Lemon wrote:
> Hi Lily.
> Two problems. You have named the month field "mon" and then refer to
> it as "month". Second, as the resolution of as.Date is days, it can't
> produce a v
Hi Lily.
Two problems. You have named the month field "mon" and then refer to
it as "month". Second, as the resolution of as.Date is days, it can't
produce a valid date without specifying the day. Thus:
df.count.mon<-data.frame(count=sample(1:24,24),
year=rep(2014:2015,each=2),mon=rep(1:12,2))
#
Hi R users,
I have a dataframe, with year, month, day, and other variables. I wanted to
calculated monthly values of the variables. For example, there is one
variable called 'count'. I use the code below to convert daily data to
monthly data.
df.count.mon = aggregate(count ~ year+month, data= df,
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