On 05.07.2010 14:31, Ildiko Varga wrote:
Dear All,
I faced the following problem. With the same data.frame the results are
different under Linux and Windows.
Could you help on this topic?
I guess you read in the data differently since you have different
default encodings on both platforms (e.g. latin1 vs. UTF-8) and you data
is probably not plain ASCII.
Best,
Uwe Ligges
Thanks in advance,
Ildiko
Linux:
> d = read.csv("CRP.csv")
> d$drugCode = as.numeric(d$drug)
> cor(d, use="pairwise.complete.obs")
PATIENT BL.CRP X24HR.CRP X48HR.CRP drug drugCode
PATIENT NA NA NA NA NA NA
BL.CRP NA 1.0000000 0.84324880 -0.05699590 NA -0.3367147
X24HR.CRP NA 0.8432488 1.00000000 -0.06162383 NA -0.3557316
X48HR.CRP NA -0.0569959 -0.06162383 1.00000000 NA 0.1553356
drug NA NA NA NA NA NA
drugCode NA -0.3367147 -0.35573159 0.15533562 NA 1.0000000
Warning message:
In cor(d, use = "pairwise.complete.obs") : NAs introduced by coercion
> str(d)
'data.frame': 41 obs. of 6 variables:
$ PATIENT : Factor w/ 41 levels "RV13","RV14",..: 2 3 4 6 7 12 13 14
15 17 ...
$ BL.CRP : num 7.3 31.2 4.2 6.7 1.6 7.7 5.3 38.9 1 7.3 ...
$ X24HR.CRP: num 6.1 24.9 11.1 4.9 1 5 3.7 18 1 7.3 ...
$ X48HR.CRP: num 121.5 40 28.4 34.5 33.3 ...
$ drug : Factor w/ 2 levels "active","placebo": 1 1 1 1 1 1 1 1 1
1 ...
$ drugCode : num 1 1 1 1 1 1 1 1 1 1 ...
Windows:
> d = read.csv("CRP.csv")
> d$drugCode = as.numeric(d$drug)
> cor(d, use="pairwise.complete.obs")
Error in cor(d, use = "pairwise.complete.obs") : 'x' must be numeric
> str(d)
'data.frame': 41 obs. of 6 variables:
$ PATIENT : Factor w/ 41 levels "RV13","RV14",..: 2 3 4 6 7 12 13 14
15 17 ...
$ BL.CRP : num 7.3 31.2 4.2 6.7 1.6 7.7 5.3 38.9 1 7.3 ...
$ X24HR.CRP: num 6.1 24.9 11.1 4.9 1 5 3.7 18 1 7.3 ...
$ X48HR.CRP: num 121.5 40 28.4 34.5 33.3 ...
$ drug : Factor w/ 2 levels "active","placebo": 1 1 1 1 1 1 1 1 1
1 ...
$ drugCode : num 1 1 1 1 1 1 1 1 1 1 ...
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