search for: robsteel

We can't post images here so I've put up a web page to show off a neat little animation in R: http://www.geocities.com/robsteele/ Adios!

> Please go download -8 and test it. Sorry to be ignorant but how do I do that in EL6? Thanks!

Here's some code to make lissajous dance. I've attached a small sample GIF. Cheers, Rob Steele robsteele at yahoo dot com plot.lissajous = function(omega.x, omega.y, delta = 0, num.thetas = 200) { thetas = seq(0, 2 * pi, length = num.thetas) xs = sin(omega.x * thetas + delta) ys = cos(omega.y * thetas) plot(xs, ys, type = 'l', lwd = 3, ann = FALSE, axes = FALSE) } ## Show one...

These are the ways that occur to me. ## This produces a logical vector, which will get converted to a numeric ## vector the first time a number is assigned to it. That seems ## wasteful. x <- rep(NA, n) ## This does the conversion ahead of time but it's still creating a ## logical vector first, which seems wasteful. x <- as.numeric(rep(NA, n)) ## This avoids type conversion but still

I'm finding that readLines() and read.fwf() take nearly two hours to work through a 3.5 GB file, even when reading in large (100 MB) chunks. The unix command wc by contrast processes the same file in three minutes. Is there a faster way to read files in R? Thanks!

Hi, On Fri, Jun 10, 2016 at 12:28 PM, Rob Steele <robsteele at yahoo.com> wrote: > > Please go download -8 and test it. > > Sorry to be ignorant but how do I do that in EL6? > You can download the RPMs here: http://koji.fedoraproject.org/koji/buildinfo?buildID=771672 > > Thanks! > > ______________________________________...

I run an external program a few hundred times via status <- system(command = "blah blah blah") and pretty soon Linux thinks R is using tons of memory. R doesn't think so, at least not according to gc(). I'm also opening, reading and closing files but I don't think that's where the problem lies. Eventually the system command fails with a status of -1 and a message

Is there a faster way to get moving quantiles from a time series than to run quantile() at each step in the series? Thanks, Rob

This is in a 64 bit CentOS 5.6 instance at Amazon AWS with R version 2.14.1 (2011-12-22). It happens on several packages: RMySQL, RODBC, FastICA. Many other packages install just fine. Here's an example error message: * installing *source* package 'RODBC' ... ** package 'RODBC' successfully unpacked and MD5 sums checked sh: ./configure: /bin/sh: bad interpreter: