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R Apply Vector

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share|improve this answer edited Apr 14 at 20:44 answered Apr 14 at 20:34 abind-off 515 @ChrisYee90 did this answer your question? –abind-off Apr 24 at 12:06 add a comment| Next number in sequence, understand the 1st mistake to avoid the 2nd About a man and a bee What's a Racist Word™? Not the answer you're looking for? I'll give a toy example of the problem, which shows up regularly in real (but more complicated) contexts.

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R Apply Vector

There are many functions by that name.... Using multiple custom meta data keyword Criteria in a single query as LIKE operators How do I install the latest OpenOffice? Just use diff() instead of apply(,, diff) in your function and you'll be fine.

  1. Am I a victim of age discrimination?
  2. Discontinuity in the angle of a complex exponential signal Why don't browser DNS caches mitigate DDOS attacks on DNS providers?
  3. in which-func-mode Using multiple custom meta data keyword Criteria in a single query as LIKE operators Illegal assignment from List to List Cannot get promoted.
  4. But even if backward compatibility weren't a problem, this wouldn't be a good solution, since the times when we want drop to be TRUE are even more numerous than when we
  5. Here you will find daily news and tutorials about R, contributed by over 573 bloggers.
  6. I was trying to run bootrapping on the dataset "shoes" from MASS package.
  7. http://cran.r-project.org/doc/manuals/r-release/R-lang.html#Vector-objects So atomic in this instance is referring to vectors as the basic building blocks of R objects (like atoms make up everything in the real world).
  8. Join them; it only takes a minute: Sign up Error: dim(X) must have a positive length when using “lapply” up vote 0 down vote favorite When running this command: tmp <-

Browse other questions tagged r or ask your own question. It's probably hopeless to try to change now, but I think it would have been better for scalars to be treated as vectors or converted to vectors as necessary, without pretending How to remove screws from old decking What does the word "most" mean? Fun In R Efficiently find whether a string contains a group of characters (like substring but ignoring order)?

The codes are : apply(state.x77[,"Population"],2,FUN=mean) #Error in apply(state.x77[, "Population"], 2, FUN = mean) : # dim(X) must have a positive length how can I prevent this error? Lapply Sapply The best idea I can come up with is to let subscripts be separated by semicolons as well as commas, with use of a semicolon signaling that drop will be FALSE. asked 2 years ago viewed 4184 times Blog Stack Overflow Podcast #92 - The Guerilla Guide to Interviewing Related 13r Error dim(X) must have a positive length?0R: Applying a dprime function more hot questions question feed lang-r about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

Where's the 0xBEEF? Tapply But I still have some problem here. > as.matrix(data.frame(shoes),nrows=10,ncols=2,byrow=T) A B [1,] 13.2 14.0 [2,] 8.2 8.8 [3,] 10.9 11.2 [4,] 14.3 14.2 [5,] 10.7 11.8 [6,] 6.6 6.4 [7,] 9.5 Scroll a quarter (25%) of the screen up or down how Magento validate XSD schema? Learn R R jobs Submit a new job (it's free) Browse latest jobs (also free) Contact us Welcome!

Lapply Sapply

split on factor, sapply, and lm Error in apply() : dim(X) must have a positive length R: Applying a dprime function - apply() error 'dim(X) must have a positive length' dim(X) how Magento validate XSD schema? R Apply Vector Join them; it only takes a minute: Sign up dim(X) must have a positive length in R up vote 0 down vote favorite I want to see how many positive and R Apply Function To Each Row How neutrons interact if not through an electromagnetic interaction?

If you want to find this for each column in the whole dataset apply(df1[-1], 2, function(x) length(x[x<0])) assuming that the first column is rownames. –akrun Feb 18 '15 at 10:33 1 Not the answer you're looking for? Is it a Good UX to keep both star and smiley rating system as filters? dim(sapply(xxx, mean)) # why? Error In Match.fun(fun) : Argument "fun" Is Missing, With No Default

Why would breathing pure oxygen be a bad idea? In multimember constituencies of the House of Commons, how many votes did each voter have? This was indeed the design flaw that I was going to get to next! Word for making your life circumstances seem much worse than they are How do I translate "hate speech"?

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Does the code terminate? If we modify the function as follows: subset.norms2 <- function (X, s) { sqrt(apply(X[,s,drop=FALSE]^2,1,sum)) } We get the right answers: > for (k in 1:4) print(subset.norms2(M,k:4)) [1] 12.88410 14.62874 16.43168 [1]

E.g. > apply(1:10,2,mean) Error in apply(1:10, 2, mean) : dim(X) must have a positive length Which means you can just use the mean function directly against the matrix subset which you

Why is Pascal's Triangle called a Triangle? The system returned: (22) Invalid argument The remote host or network may be down. Maximize result of bitwise AND more hot questions question feed lang-r about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life Why is Pascal's Triangle called a Triangle?

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People could start using the semicolon whenever they're not trying to extract single elements, without breaking old programs. Recent popular posts Election 2016: Tracking Emotions with R and Python The new R Graph Gallery Paper published: mlr - Machine Learning in R Most visited articles of the week How The more serious problem, and what makes this a real design flaw, is that writing code without drop=FALSE is so much easier that it's often left out even when it is Browse other questions tagged r or ask your own question.

Michael Weylandt Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ Re: Error in apply(x2, 1, diff) : dim(X) must have a positive Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name August Package Picks Slack all the things!