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Closed 11 years ago.
I need to generate the numbers from 2 to 100 excluding the numbers (11,21,31,41 etc).
I know to do 2 to 100 is simply 2:100 but I am uncertain how I would go about excluding certain values.
Thanks for any help.
probably not too elegant but works.
c(1:100)[-seq(from=1, to=91, by=10)]
however, your question could have been improved ;)
Related
This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.
Closed 10 years ago.
I have got a little problem. I have data which I want to map but the thing is that I dont have real location names just the short forms like: SANSAN210 OR miamia305 which I think is the the state and the county and the area code phone number. Does anyone how to convert this so I can map it on the us map?
All you need is the area code (or possibly the county-areacode intersection). There are area code maps as shapefiles. Use readShapePoly or readOGR and merge the two.
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Closed 10 years ago.
What is the chance that the first five cards chosen from a deck of 52(bridge/poker) cards will contain Two(only two) cards of the same denomination(two 3's for example)?
How can we solve the following problem by resampling method in R
On Wikipedia, they have the formula for finding the probability for two alike cards, three of a kind, etc.. I'd use that formula.
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Closed 9 years ago.
I've noticed that multi=TRUE is not functional when used in gfile.
For example look at the following structure:
getfiles <- gfile(type = c("open"), filter=list("txt"=list(patterns=("*.txt"))), multi=TRUE)
Thanks, there is a typo. Try using "multiple" instead of "multi" for now or grab the latest from r-forge.
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Closed 10 years ago.
So I have this assignment:
I need help with question 2.
I thought I knew how to do it, when I realized the factorials are being computed backwards. The algorithm is correct intuitively, but I can't seem to find a loop invariant that holds true before the loop starts.
I'm confused. Thanks.
Hint. It does not change the result of the algorithm if you add z <- y before the loop begins. Does that make your loop invariant easier to find?
This is probably what you're looking for. It doesn't contain only the answer itself but also provides a useful explanation so i reckon it's good learning material.
This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.
Closed 11 years ago.
How do I get the regular expression for excluding special charaters and numbers? Thanks in advance.
Try the following: ^[a-zA-Z]*$
possible regex
[^()[\]{}*&^%$##!]+
this will match anything but ()[]{}*&^%$##!
the [^...]+ is a "any character except ..." and the ] must be escaped with \]
http://www.myregextester.com/?r=37f5dfd3