Contact
Contact
Stay up to date
We'll highlight new content in your collectives with a blue activity indicator on navigation items and posts.
Manage preferences
Pinned content
View all 3 collectionsR Language admins have deemed these posts noteworthy.
Pinned
Score of 22
4027 views
R Language Frequently Asked Questions
The questions that get asked repeatedly, gathered together in one place. What’s a question every R programmer asks at some point? Add it here! Grab questions from the r-faq tag to get them added ...
- reputation score 101
Pinned
Score of 48
5061 views
2 minute read
How to write a good R question with a reproducible example
This article is largely written based on https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
When posting a question to Stack Overflow, you should include a minimal ...
anon
Can you answer these questions?
View all unanswered questionsThese questions still don't have an answer
Score of 0
0 answers
22 views
Trouble with fitting confirmatory factor models in R with lavaan
I am currently working on a scale development project. The scale is a measure of objective knowledge and therefore the variables are binary (0=incorrect answer, 1=correct answer). I want to compare a ...
- reputation score 24572
Score of 0
0 answers
46 views
Add red shade/area to facet plot
I have a facet grid plot where I wish to add red-shaded rectangles/areas to categories for which I don't have any observations. I remember I achieved something similar with a much simpler 3×2 facet ...
- reputation score 124326
Score of 1
0 answers
97 views
Differences in results between terra::extract and exactextractr::exact_extract
I am extracting values from a raster based on a multipolygon layer. The polygons can overlap various raster cells or be wholly contained in one cell. I am interested in the sum of the value across the ...
- reputation score 625
Score of -3
0 answers
95 views
How to obtain and export a panelAR regression result?
Question update ; I am trying to summarize a panelAR model using modelsummarymodelsummary, which doesn't support panelAR models. I followed their instructions regarding unsupported models from this ...
- reputation score 5
Score of -1
0 answers
68 views
Piecewise SEM pathway plotting
I want to visualize my piecewise SEM models which have 5 exogenous climate variables, 3 tree physiological mediators and one tree growth response variable. I attempted at it manually, but I would like ...
- reputation score 11
Recommended answers
View all recommended answersThese answers have been recommended
Score of 1
1 answer
123 views
How to include plain text or markdown prose inside a reprex?
When creating a reproducible example using the {reprex} package, how can I include plain text explanations or markdown prose between my R code blocks without having them interpreted as standard R ...
Answer
To include plain text or markdown prose between your code blocks in a {reprex}, you need to use Roxygen style comments starting with #'. The {reprex} package uses knitr::spin() under the hood. Any ...
Score of 2
2 answers
126 views
Dropping unused y values when using scale_x_datetime(limits =)
I have been looking for a solution to automatically drop unused y values when specifying limits in a ggplot2::scale_x_datetime() call, such as:
library(ggplot2)
ggplot(data=economics, aes(x=date, y=...
Answer
The core issue is that scale_x_date(limits=) filters data before y range training, but the y scale is still trained on the full dataset. coord_cartesian(xlim=) zooms but doesn't retrain the y scale ...
Advice
1
vote
1
replies
109
views
Checking whether external pointer of a data.table is valid
I think this example speaks for itself:
tmp <- data.table::data.table(a = 1)
set_ <- function(x) data.table::set(x, j = "b", value = 2)
set_(tmp)
tmp # Is modified by reference, as ...
- reputation score 209876
Answer
If you want to check if the reference is valid, the data.table package has a .selfref.ok() function data.table::.selfref.ok(tmp3) # [1] FALSE data.table::.selfref.ok(tmp2) # [1] TRUE data.table::....
View answer
- reputation score 209876
Score of 2
1 answer
78 views
move legend in empty facet
I'm using facet_wrap2 to plot some data for different chromosomes. The thing is that I have some empty space beneath chr19 and chr20 and wish to move the legend there.
So, I was following this post ...
- reputation score 169425
Answer
Accepted
Following and updating my comment, you can use lemon::reposition_legend() to bring the legend into one of the facets. Up front, though, we can't use facet_wrap2() since that doesn't label the empty ...
View answer
- reputation score 169425
Advice
6
votes
3
replies
383
views
What's the difference between the left curly brace and the right curly brace?
In the R documentation, it says:
Open parenthesis, (, and open brace, {, are .Primitive functions in R.
...
For {, the result of the last expression evaluated. This has the visibility of the last ...
Answer
Yes, you're right. In R, operators are actually functions that can be called with backtick notation and we can be aliasing to readable names first: parenthesis = `(` assignment = `<-` plus = `+` ...
See what's trending
View all trending questionsThese are the most active questions in R Language Collective
Score of 2463
23 answers
495047 views
How to make a great R reproducible example
When discussing performance with colleagues, teaching, sending a bug report or searching for guidance on mailing lists and here on Stack Overflow, a reproducible example is often asked and always ...
- reputation score 30938
Score of 1512
21 answers
1399102 views
Sort (order) data frame rows by multiple columns
I want to sort a data frame by multiple columns. For example, with the data frame below I would like to sort by column 'z' (descending) then by column 'b' (ascending):
dd <- data.frame(b = factor(c(...
- reputation score 2958
Score of 996
30 answers
2240615 views
How do I replace NA values with zeros in an R dataframe?
I have a data frame and some columns have NA values.
How do I replace these NA values with zeroes?
- reputation score 335
Score of 1054
25 answers
2006744 views
Drop data frame columns by name
I have a number of columns that I would like to remove from a data frame. I know that we can delete them individually using something like:
df$x <- NULL
But I was hoping to do this with fewer ...
- reputation score 43187
Score of 1571
14 answers
1925477 views
How to join (merge) data frames (inner, outer, left, right)
Given two data frames:
df1 = data.frame(CustomerId = c(1:6), Product = c(rep("Toaster", 3), rep("Radio", 3)))
df2 = data.frame(CustomerId = c(2, 4, 6), State = c(rep("Alabama&...
- reputation score 2958
Learn something new
These are the most recent articles in R Language Collective
Score of 48
5061 views
2 minute read
How to write a good R question with a reproducible example
This article is largely written based on https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
When posting a question to Stack Overflow, you should include a minimal ...
anon
Score of 22
3338 views
3 minute read
Create multiple PDF/HTML reports using R Markdown in a loop
How to create multiple PDF/HTML reports in a loop using R Markdown
With R Markdown, creating a PDF or HTML report is straightforward. But what if you want to create various reports? Furthermore, what ...
- reputation score 848
Members can contribute articles
Simply submit a proposal, get it approved, and publish it.
See how the process works
Simply submit a proposal, get it approved, and publish it.
See how the process works