Have you tried: mean(x) mean(as.numeric(as.character(x))) mean(x_ema) mean(as.numeric(as.character(x_ema)))
What is the result of the following: which(is.na(as.numeric(as.character(x_ema)))) Abit hard since you don't provide the data, but there may be an NA or character value that is causing the error. Hope this helps at a bit. --- On Fri, 10/16/09, Reuben Bellika <rube...@gmail.com> wrote: > From: Reuben Bellika <rube...@gmail.com> > Subject: [R] Cannot calculate mean() for double vector > To: r-help@r-project.org > Date: Friday, October 16, 2009, 12:06 PM > I've been using R recently to analyze > some data, but I'm having a > problem using the mean() function. > > I imported the original data set as a vector of integers, x > and then > calculated a exponential moving average of the data, x_ema. > This part > worked fine. > > Then, I tried to find the mean squared error between the > original > series and the moving average, using mse = mean((x - > x_ema)^2). This > gives N/A as a result, which seems to be the result of the > mean > function. When I run mean() on x_ema, which is of data type > double, it > always returns N/A. I can find the mean of the original > integer data > just fine, as well as for a simple test vector of 10 > doubles, but it > never seems to return a usable result for the x_ema vector. > Is this > because the vector is too long? (Both x and x_ema contain > around 40000 > values). Am I running into some memory limit? I can do > other > calculations with x_ema just fine, it's only the mean() > function that > doesn't seem to work. All the information in the help seems > to > indicate that this operation should work without a > problem. > > If it matters at all, I'm using R 2.9.2 running on Windows > Vista. > > I'd appreciate any help or suggestions as to what might be > wrong. > > Thank you, > Reuben Bellika > > ______________________________________________ > R-help@r-project.org > mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, > reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
