Thanks, Gabor. It's a nice workaround. I'll look more at zoo library.
On Fri, Apr 15, 2011 at 7:10 PM, Gabor Grothendieck wrote:
> On Fri, Apr 15, 2011 at 6:10 PM, zhenjiang xu
> wrote:
> > Thanks, Dennis! I'll go with it. It's surprising there is no ready way to
> do
> > that. I imagine it sho
On Fri, Apr 15, 2011 at 6:10 PM, zhenjiang xu wrote:
> Thanks, Dennis! I'll go with it. It's surprising there is no ready way to do
> that. I imagine it should be a common data manipulation to add two
> data.frame from two different sources. It could happen that one data.frame
> is missing some ro
Thanks, Dennis! I'll go with it. It's surprising there is no ready way to do
that. I imagine it should be a common data manipulation to add two
data.frame from two different sources. It could happen that one data.frame
is missing some rows while the other have some more.
On Fri, Apr 15, 2011 at 5:
Hi:
Here's one approach:
> df1 <- data.frame(x = letters[1:3], y = 1:3)
> df2 <- data.frame(x = c('a', 'c'), z = c(6, 1))
> dfm <- merge(df1, df2, all.x = TRUE)
> dfm
x y z
1 a 1 6
2 b 2 NA
3 c 3 1
sumdf <- data.frame(x = dfm$x, y = rowSums(dfm[, -1], na.rm = TRUE))
x y
1 a 7
2 b 2
3 c 4
Hi all,
Suppose I have 2 data.frame , a and b, how can I add them together to get c?
Thanks
> a
A
a 1
b 2
c 3
> b
A
a 6
c 1
> c
A
a 7
b 2
c 4
--
Best,
Zhenjiang
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