[R] Using R for processing computer performance data

Peter Gallanis peter at gallanis.com
Sun Apr 29 18:11:12 CEST 2001


Thank you for the quick reply, and direction.  I must still be missing
something though, because I am receiving an error when I try to use by or
tapply.  Can you please see if I'm doing something correctly in the dialog
is listed below.

> diskact<-read.csv("c:/data1/sardisk.csv")
> diskactF<-factor(diskact$device)
> by(diskact$busy, diskactF, boxplot)
Error in Summary.factor(..., na.rm = na.rm) :
        "range" not meaningful for factors
In addition: Warning messages:
1: "+" not meaningful for factors in: Ops.factor(x[floor(d)], x[ceiling(d)])
2: "<" not meaningful for factors in: Ops.factor(x, (stats[2] - coef * iqr))
3: ">" not meaningful for factors in: Ops.factor(x, (stats[4] + coef * iqr))
> tapply(diskact$busy, diskactF, boxplot)
Error in Summary.factor(..., na.rm = na.rm) :
        "range" not meaningful for factors
In addition: Warning messages:
1: "+" not meaningful for factors in: Ops.factor(x[floor(d)], x[ceiling(d)])
2: "<" not meaningful for factors in: Ops.factor(x, (stats[2] - coef * iqr))
3: ">" not meaningful for factors in: Ops.factor(x, (stats[4] + coef * iqr))
>

Thank you,
Peter Gallanis


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