IT Nursery
I started getting a new message (see post title) when running group_by and summarise() after updating to dplyr development version 0.8.99.9003. Here is an example to recreate the output:...
.SD looks useful but I do not really know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What...
Commands: t <- data.frame(v = 5:1, v2 = 9:5) write.csv(t, "t.csv") Resulting file: # "","v","v2" # "1",5,9 # "2",4,8 # "3",3,7 # "4",2,6 # "5",1,5 How do I prevent...
Is there a way to extract the file name from the file full path (part of a file path) without the hassle of manipulating string? The equivalent in Java...
So " xx yy 11 22 33 " will become "xxyy112233". How can I achieve this? 9 Answers 9
Does anyone have any wisdom on workflows for data analysis related to custom report writing? The use-case is basically this: Client commissions a report that uses data analysis, e.g....
I have a dataframe with multiple columns. For each row in the dataframe, I want to call a function on the row, and the input of the function is...
df <- data.frame(var1 = c('a', 'b', 'c'), var2 = c('d', 'e', 'f'), freq = 1:3) What is the simplest way to expand each row the first two columns of...
Every time I make a plot using ggplot, I spend a little while trying different values for hjust and vjust in a line like + opts(axis.text.x = theme_text(hjust =...
I’m trying to learn R and I can’t figure out how to append to a list. If this were Python I would . . . #Python vector = ...