Hi catalin,
I think what you are trying to do is to retrieve the original
observations from the cumulated values. In that case Olivier's
suggestion will do what you want:
c(x[1],diff(x))
Jim
On Sat, Mar 5, 2016 at 1:59 AM, catalin roibu wrote:
> I mean the first row value
>
> În Vin, 4 mar. 20
I mean the first row value
În Vin, 4 mar. 2016, 16:15 Jeff Newmiller, a
scris:
> "Keep the first values" is imprecise, but mixing an absolute value with a
> bunch of differences doesn't usually work out well. I frequently choose
> among
>
> x <- sample( 10 )
> dxright <- c( 0, diff(x) )
> dxlef
"Keep the first values" is imprecise, but mixing an absolute value with a bunch
of differences doesn't usually work out well. I frequently choose among
x <- sample( 10 )
dxright <- c( 0, diff(x) )
dxleft <- c( diff(x), 0 )
for calculation purposes depending on my needs.
--
Sent from my phone.
Hi,
(1) You should provide a minimal working example;
(2) But anyway, does...
x = sample(10)
c(x[1],diff(x))
... do what you want?
Olivier.
On Fri, 4 Mar 2016
13:22:07 +0200 catalin roibu wrote:
> Dear all!
>
> I want to calculate difference between successive values (cumulative
> values)
Dear all!
I want to calculate difference between successive values (cumulative
values) with R. I used diff function, but I want to keep the first values.
Please help me to solve this problem!
Thank you!
Best regards!
CR
--
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Catalin-Constantin ROIBU
Lecturer PhD, Forestry engineer
Fores
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