R

rbind.fill from the package plyr might be what you are looking for.

The answer below refers to the case when you have 2 arguments in facet_grid() or facet_wrap(). facet_grid(x ~ y) will display x*y plots even if some plots are empty. Ex: There are 4 distinct cyl and 7 distinct class values. The above displays 4 * 7 = 28 plots, even if some are empty (because some classes do not have corresponding … Read more

Since (still) nobody got check-mark, I assume that you have some practical issue in mind, mostly because you haven’t specified what type of vector you want to convert to numeric. I suggest that you should apply transform function in order to complete your task. Now I’m about to demonstrate certain “conversion anomaly”: Let us have a glance at data.frame … Read more

It could be the out of memory killer of the operating system. Are you cleaning up your workspace when you have finished with a dataset?

Change the definition of multiply to take additional unknown arguments:

I think you intended to have this:

The problem is that omega in your case is matrix of dimensions 1 * 1. You should convert it to a vector if you wish to multiply t(X) %*% X by a scalar (that is omega) In particular, you’ll have to replace this line: with: everywhere in your code. It happens in two places (once … Read more

Knitr produces a R session, without a default cran mirror unless you specifically asked for one. We tend to forget we need to set up CRAN for every R session when we use Rstudio because it takes care of it, but only for interactive use, not for knitr. You could try specifying a mirror as … Read more

Your logic will need to also exclude NAs in the subset. See the following example. Note the subsets vectors are stored away before x is modified.