search for: wx1

...would like to compute the weighted average by group. df <- data.frame(x1 = c(15, 12, 3, 10, 10, 14, 12), x2 = c(10, 11, 16, 9, 7, 17, 18), g = c( 1, 1, 1, 2, 2, 3, 3), w = c( 2, 3, 1, 5, 5, 2, 5)) wx1 <- sapply(split(df, df$g), function(x){weighted.mean(x$x1, x$w)}) wx2 <- sapply(split(df, df$g), function(x){weighted.mean(x$x2, x$w)}) The above code works, the result is: > wx1 1 2 3 11.50000 10.00000 12.57143 > wx2 1 2 3 11.50000 8.0000...

Hi everyone, I'm a newbie to centos and having trouble upgrading java's jdk1.4 to jdk1.5. I assume I have to get the jdk from jpackage, but I'm having trouble locating it, let alone finding any instructions on how to upgrade. Much appreciated if anyone can help. Thanks!

I am attempting to build from a src.rpm (knowing very little about rpm at all) and the spec file notes that the architecture should be set on the command line: > # platform defines - set one below or define the build_xxx on the command line Now. My question is this, how does one do this using rpmbuild? The syntax rpmbuild --target centos4 package.src.rpm seemingly has no effect.

Hi, I'm having trouble getting my Palm to sync with jpilot on my Centos system via USB. When I sync, I get this error in jpilot: pi_accept Illegal seek Exiting with status SYNC_ERROR_PI_ACCEPT Finished I have jpilot syncing fine with this Palm over the network, BTW. For USB, I set things up for udev as described on various websites. Here are the relevant ports & symlink (created

Hi, I was asking about php 5.2 because I would like to use this program with these requirements: http://www.magentocommerce.com/system-requirements This ecommerce store is built with the zend framework and requires php 5.2. Mcrypt is not in the centos mirrors either. I did manage to get this beta ecommerce store installed on php 5.1.6-12 by removing the mycript line in the install xml file and