Nothing wrong: The modulo is the number after +. In general, for two numbers a and b, there is Let’s write a toy function: Update: Instead of using floor(a / b) to get quotient, we can also use a %/% b.
You can, if you want, use standalone strings for multi-line comments — I’ve always thought that prettier than if (FALSE) { } blocks. The string will get evaluated and then discarded, so as long as it’s not the last line in a function nothing will happen. The main limitation is that when you’re commenting stuff out, you’ve … Read more
Assuming your dataframe is mydf:
Just following on Matt and Dirk. If you want to recreate your existing data frame without changing the global option, you can recreate it with an apply statement: This will convert all variables to class “character”, if you want to only convert factors, see Marek’s solution below. As @hadley points out, the following is more concise. … Read more
as.name(char[1]) will work, although I’m not sure why you’d ever really want to do this — the quotes won’t get carried over in a paste for example:
<<- is most useful in conjunction with closures to maintain state. Here’s a section from a recent paper of mine: A closure is a function written by another function. Closures are so-called because they enclose the environment of the parent function, and can access all variables and parameters in that function. This is useful because it allows us … Read more
Read this thread R – boolean operators && and ||. Basically, the & is vectorized, i.e. it acts on each element of the comparison returning a logical array with the same dimension as the input. && is not, returning a single logical.
You are slightly over-concerned with the warning message: fixed-effect model matrix is rank deficient so dropping 7 columns / coefficients. It is a warning not an error. There is neither misuse of lmer nor ill-specification of model formula, thus you will obtain an estimated model. But to answer your question, I shall strive to explain it. During … Read more
Here are a few options for changing text / label sizes The size in the geom_text changes the size of the geom_text labels. For this And why size of 10 in geom_text() is different from that in theme(text=element_text()) ? Yes, they are different. I did a quick manual check and they appear to be in the ratio of ~ (14/5) for geom_text sizes to theme sizes. … Read more
Since you mention Pandoc in your comments, maybe it’s not cheating to depend on Pandoc’s extensions for subscript and superscript. From here, we can create a minimal example Rmd file: Using Knitr results in an HTML file that renders like this: That clearly doesn’t work. But you can run pandoc on the resulting markdown file (which I’ve named “Subscripts.md”): … Read more