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31.81
2012 Aug 06
5
sapply() and by()
Hello everyone,
I have a dataset with 5 colums (4 colums with thresholds of weather
stations and one with month - data of 5 years). Now I would like to
calculate the average for each month.
I tried this unsuccessfully:
lf.med <- sapply(LF[,1:4],mean,LF[,5])
Error in mean.default(X[[1L]], ...) :
'trim' must be numeric and have length 1
With
lf.med <- by(LF[,1:4],LF[,5],mean)
2002 Sep 10
2
Traceroute
How do I allow traceroute to reach my server? Pings work fine but
traceroute stops at the last hop before my server. If I shut off the
firewall it reaches it fine.
PING danicar.net (24.222.246.120): 56 data bytes
64 bytes from 24.222.246.120: icmp_seq=0 ttl=237 time=104.0 ms
64 bytes from 24.222.246.120: icmp_seq=1 ttl=237 time=74.9 ms
64 bytes from 24.222.246.120: icmp_seq=2 ttl=237 time=90.6