Displaying 4 results from an estimated 4 matches for "qn3".
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2009 Jan 26
0
why two diff. se in nlsList?
...(nlme)
> fm1 <- nlsList(uptake ~ SSasympOff(conc, Asym, lrc, c0),
data = CO2, start = c(Asym = 30, lrc = -4.5, c0 = 52))
> summary(fm1)$para[,,1]
Estimate Std. Error t value Pr(>|t|)
Qn1 38.13977 0.9911148 38.48169 1.991990e-06
Qn2 42.87169 1.0932089 39.21638 2.583953e-06
Qn3 44.22800 1.0241029 43.18706 1.809264e-07
Qc1 36.42874 1.1941594 30.50576 1.140085e-05
Qc3 40.68373 1.2480923 32.59673 1.424635e-04
Qc2 39.81950 1.0167249 39.16447 2.692304e-06
Mn3 28.48286 1.0624246 26.80930 1.066434e-06
Mn2 32.12827 1.0174826 31.57624 3.488786e-06
Mn1 34.08482 1.3400596 25....
2010 Dec 17
2
newbie question on str output
Hi!
Here is some output from an str command:
> str(CO2)
Classes ‘nfnGroupedData’, ‘nfGroupedData’, ‘groupedData’ and
'data.frame': 84 obs. of 5 variables:
$ Plant : Ord.factor w/ 12 levels "Qn1"<"Qn2"<"Qn3"<..: 1 1 1 1 1 1 1 2
2 2 ...
$ Type : Factor w/ 2 levels "Quebec","Mississippi": 1 1 1 1 1 1 1 1 1 1
...
$ Treatment: Factor w/ 2 levels "nonchilled","chilled": 1 1 1 1 1 1 1 1 1 1
...
$ conc : num 95 175 250 350 500 675 1000 95 175 250 .....
2008 Apr 14
5
Equivalent to a BY command in SAS
Hi,
I'm very new to R and absolutely love it. Does anyone know how to use
something in R that functions like a BY command in SAS?
For example, let's say you have a variable x, and you want to see the mean.
Easy...
> mean(x)
But what if you want to see the mean of x conditional on another discrete
variable? My best attempts so far are something like...
> mean(x, y_cat=1)
2009 Jul 23
1
[PATCH server] changes required for fedora rawhide inclusion.
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