Hello,
Because there's a bug in the way I read the data: data.matrix is not
well used here, it transforms all variables in character vectors and may
cause problems such as
> "9" < "10"
[1] FALSE
> "9" > "10"
[1] TRUE
It was David Winsemius that pointed this out.
As a side effect, data.matrix returns a matrix so '$' is invalid.
Use read.table and both codes are equivalent.
Rui Barradas
Em 01-08-2012 14:28, arun escreveu:
HI,
The code was working perfectly fine yesterday and today, until half an hour
ago. Couldn't find any problems in the code. Still, I am getting error message.
myMatrix <- data.matrix(read.table(text="
Name Age
ANTONY 27
IMRAN 30
RAJ 22
NAHAS 32
GEO 42
", header=TRUE))
MinMaxArray <- data.frame(MIN = 25,MAX=35)
myMatrix[myMatrix$Age<=MinMaxArray$MAX & myMatrix$Age>=MinMaxArray$MIN,]
#Error in myMatrix$Age : $ operator is invalid for atomic vectors
#Then, I tried Rui's code;
inx <- MinMaxArray[[ "MIN" ]] <= myMatrix[, "Age"] & myMatrix[, "Age"]<= MinMaxArray[[
"MAX" ]]
myMatrix[ inx , ]
Name Age
[1,] 1 27
[2,] 3 30
[3,] 4 32
#Previously, this was also working fine.
Not sure what is happening.
A.K.
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