Displaying 4 results from an estimated 4 matches for "fev1".
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dev1
2003 Mar 13
2
RODBC and Excel in Widows
Hello, I have some problems with RODBC and Excel in Win98
I am using R 1.6.2 and just upgraded RODBC to the last version on CRAN.
I have an Excel file with columns Number, Name, Sex, Age, FEV1 on Sheet
1 and Number, Age, FEV1, Name, Sex on Sheet 2.
Now I open the channel to the file
> chan1 <- odbcConnectExcel("c:/testOdbc.xls")
> tables(chan1)
and the list appears with the 2 tables
> aa -> sqlFetch(chan1,"Sheet1")
and aa has the Number, Name and Sex co...
2009 Aug 27
5
Transform data for repeated measures
I have a dataset that I'm trying to rearrange for a repeated measures analysis:
It looks like:
patient basefev1 fev11h fev12h fev13h fev14h fev15h fev16h fev17h fev18h drug
201 2.46 2.68 2.76 2.50 2.30 2.14 2.40 2.33 2.20 a
202 3.50 3.95 3.65 2.93 2.53 3.04 3.37 3.14 2.62 a
203 1.96 2.28 2.34 2.29 2.43 2.06 2.18 2.28 2.29 a
204 3.44 4...
2010 Dec 22
1
Seeking feedback on my first attempt at R programming
...efined functions commented out at the bottom of the code don't work whereas the one I ultimately went with did.
Thanks,
Paul
######################################
#### Chapter 5: The Two-Sample T-Test ####
######################################
#### Example 5.1: Two-Sample t-Test using FEV1 Changes Data ####
connection <- textConnection("
101 A 1.35 <NA> 103 A 3.22 3.55 106 A 2.78 3.15
108 A 2.45 2.30 109 A 1.84 2.37 110 A 2.81 3.20
113 A 1.90 2.65 116 A 3.00 3.96 118 A 2.25 2.97
120 A 2.86 2.28 121 A 1.56 2.67 124 A 2.66 3.76
102 P 3.01 3.90 104 P 2...
2003 Nov 15
5
correlation and causality examples
Dear All,
I'am looking for examples showing that correlation does not imply
causality, the targeted audience consists of undergraduate students
(their first year at the university but in the BioMathStat track).
All practicals are under R.
I was able to extract this from R datasets:
### begin
data(sunspots)
data(lynx)
spots <- window(sunspots, freq = 1, start = 1880, end = 1900)
lnx <-