Hello, thank you very much for your help in last email. it is very helpful. right now, i have more questions about my project,
1. solve can i remove the NA from a vectors:
for exmample, if my vector is:
v <- (NA, 1, 2, 3, 4, 5)
which should read v <- c(NA, 1, 2, 3, 4, 5):
how can I remove the NA from vector v
v <- v[!is.na(v)]
2. how I can get input from the user?
try "?readline"
3. can I read more than one data files in one program? and how i can write something to a file
?read.table, ?write.table, ?scan, ?readLines, ?write
4. how i can display/output something on the screen?
?print, ?x11, ?plot, ?Devices
thank you so muchone remark: I personally think it's a bad idea to refer people too quickly (with implied reproach) to the manuals (if the manuals are good, _anything_ is written down _somewhere_ but it might take substantial time to find it).
Best wish
C-Ming
Jan 24, 2005
but at the very least your questions 2.-4. (and the solution to no. 1 is not so hard to find either) are so elementary, that you probably have not spent a single minute reading the documentation (online help or e.g. Introduction to R). and that is in my view not a healthy ratio of "time I invested myself to solve the problem" to "time others invest to solve my problem".
no offense meant, but really ...
joerg
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