I have a large, wide data.table (20m rows) keyed by a person ID but with lots of columns (~150) that have lots of null values. Each column is a recorded state / attribute that I wish to carry forward for each person. Each person may have anywhere from 10 to 10,000 observations and there are … Read more
Suppose I have this data frame: times vals 1 1 2 2 3 4 3 7 6 set up with foo <- data.frame(times=c(1,3,7), vals=c(2,4,6)) and I want this one: times vals 1 1 2 2 2 2 3 3 4 4 4 4 5 5 4 6 6 4 7 7 6 That is, I … Read more
is there any way to plot a graph like this in R and have the same 12 axes on it with thier name ? here’s a pic for the graph. here’s a piece of my data Date1 Time TravelTime 1 2016-09-04 13:11 34 2 2016-09-04 13:12 34 3 2016-09-04 13:13 33 4 2016-09-04 13:14 33 … Read more
If I have a string, x <- “Hello World” How can I access the second word, “World”, using string split, after x <- strsplit(x, ” “) x[[2]] does not do anything. Answer As mentioned in the comments, it’s important to realise that strsplit returns a list object. Since your example is only splitting a single … Read more
This question already has answers here: bash alias command with both single and double quotes (4 answers) Closed 1 year ago. This was the alias: # make a tmux session in working dir with the name of the dir alias th=’tmux new -s $(pwd | tr ‘\/’ ‘\n’ | tail -n 1)’ It doesn’t work … Read more
If we have a list, and each item can have different length. For example: l <- list(c(1, 2), c(3, 4,5), c(5), c(6,7)) (In order to be clear, we will call objects in a list “items”, and objects in the objects of list “elements”.) How can we extract, for example the first element of each item? … Read more
I cannot find out can to get a list of all entry of the sublists? Here’s a simple example, a list o lists: listoflists <- list(“A”=list(c(1,2,3),c(2,34,2)), “B” = list(c(1,2),c(2,3,2,1)), “C” = list(c(“sdf”,3,2))) $A $A[[1]] [1] 1 2 3 $A[[2]] [1] 2 34 2 $B $B[[1]] [1] 1 2 $B[[2]] [1] 2 3 2 1 $C … Read more
I’m struggling to find a straightforward solution to fix my plot. The problem stems down to the discrete nature of the x-axis. I want to annotate the plot with text and segments in order to show statistical results. 1) I want to print the p-value between “Baby” and “Queen” as well as between “Queen” and … Read more
If I want to get all subsets of a vector I can e.g. use the sets package: library(sets) v <- c(“test1”, “test2”, “test3”, “test4”) set_power(v) ## {{}, {“test1”}, {“test2”}, {“test3”}, {“test4”}, {“test1”, ## “test2”}, {“test1”, “test3”}, {“test1”, “test4”}, {“test2”, ## “test3”}, {“test2”, “test4”}, {“test3”, “test4”}, {“test1”, ## “test2”, “test3”}, {“test1”, “test2”, “test4”}, {“test1”, ## “test3”, … Read more
Is it possible to hide blocks of text within .html files created with R Markdown? The elements of text should be hidden until the user hovers over the text preferentially (or clicks a button). The elements to be hidden do not concern code blocks. Currently I include text within < p> < /p> It was … Read more
