Sorry, there's a mistake, there's a missing comma, it should be
df[df$date >= '2012-01-01'& df$date <= '2013-12-31', ]$A
Rui Barradas
Citando ruipbarra...@sapo.pt:
> Hello,
>
> Try
>
> df[df$date >= '2012-01-01'& df$date <= '2013-12-31']$A = etc
>
> Hope this helps,
>
> Rui Barradas
>
>
> C
> On Jan 29, 2016, at 10:30 PM, lily li wrote:
>
> Hi R users,
>
> I have a data frame, and I generate a date column like this:
> df$date = seq(as.Date('2012-01-01'), as.Date('2014-12-31'))
>
> df
> A B C
> 1 2 1
> 2 2 3
> 3 2 4
>
> So the data frame has 4 columns now. But when I w
Hello,
Try
df[df$date >= '2012-01-01'& df$date <= '2013-12-31']$A = etc
Hope this helps,
Rui Barradas
Citando lily li :
> Hi R users,
>
> I have a data frame, and I generate a date column like this:
> df$date = seq(as.Date('2012-01-01'), as.Date('2014-12-31'))
>
> df
> A B C
> 1 2 1
>
Hi R users,
I have a data frame, and I generate a date column like this:
df$date = seq(as.Date('2012-01-01'), as.Date('2014-12-31'))
df
A B C
1 2 1
2 2 3
3 2 4
So the data frame has 4 columns now. But when I want to change the values
of column A for specific dates, such as 2012-01-01
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