Hi all,
I have the following data
AAA 1e+06 1222.312
AAC 100.2 0.33
However the following command
dat <- read.table("mydat.txt");
print(dat)
n1 <- sum(as.matrix(dat$V1));
gives:
Error in sum(as.matrix(dat$V1)) : invalid 'type' (character) of argument
What's wrong with the data type so that it gives such error?
- Gundala Viswanath
Jakarta - Indonesia
Invalid Type of Char Argument When Sum() is Used
2 messages · Gundala Viswanath, jim holtman
Do an 'str(dat)' and see what the structure is. When I read in your data I get:
x
V1 V2 V3 1 AAA 1000000.0 1222.312 2 AAC 100.2 0.330
str(x)
'data.frame': 2 obs. of 3 variables: $ V1: Factor w/ 2 levels "AAA","AAC": 1 2 $ V2: num 1000000 100 $ V3: num 1222.31 0.33
sum(x$V1)
Error in Summary.factor(1:2, na.rm = FALSE) : sum not meaningful for factors
sum(x$V2)
[1] 1000100 So you 'V1" might be characters which is exactly what your error message is telling you.
On Fri, Mar 13, 2009 at 4:37 AM, Gundala Viswanath <gundalav at gmail.com> wrote:
Hi all,
I have the following data
AAA ?1e+06 1222.312
AAC ?100.2 ?0.33
However the following command
dat <- read.table("mydat.txt");
print(dat)
n1 <- sum(as.matrix(dat$V1));
gives:
Error in sum(as.matrix(dat$V1)) : invalid 'type' (character) of argument
What's wrong with the data type so that it gives such error?
- Gundala Viswanath
Jakarta - Indonesia
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Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve?