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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
Pinned
17
votes
2k
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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 ...
- 101
Can you answer these questions?
View all unanswered questionsThese questions still don't have an answer
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0
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Extracting matched data using overlap weights
I have generated overlap weights on R using weightit package, I generally fo regression using weights directly.
But I want to extract the matched data according to overlap weights for demographic ...
0
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0
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clmm function gives me an error "Error in x$code == 0L || action == "silent" : Error 'length = 2' in coercion to 'logical(1)'"
The following commands regarding the two types of models are executed in R
model_4_clmm <- clmm(v27_3 ~ SEX_2 + AGE + PARTLIV_2 + EDULEVEL_2 + WORK_2 + ISCO08_2 + PARTY_LR_2 + v4_3 + gdp_per_capita....
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Convert ordinal word string to ordinal number string?
Suppose I have a vector containing ordinal number words as strings in R:
ordinal_words<-c("FIRST COMPANY", "BAKERY FIFTH AVENUE", "WEST FORTIETH WAY")
I would like ...
- 793
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How do I order a barchart, but not by ascending or descending order?
I am making a bar chart breaking down time spent at each activity level(high, medium, low, and total active times) for individuals recorded to be in different fitness levels. here is the code I am ...
- 11
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NA values when using avg_predictions() from marginaleffects with a flexsurv model
I'm unsure why I do not get standard errors or confidence intervals when I fit parametric survival models and compute the predicted mean survival times using the avg_predictions(). I tried using ...
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1
vote
1
answer
74
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+100
Create dropdown list in R using plotly?
I want to create a dropdown list with the years 2019 to 2024 for this plot:
I'm using R Markdown and plotly to create the interactive plot. I managed to make this plot for 2021, but I can't seem to ...
- 153
1
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1
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101
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+50
Using LaTeX packages in Quarto YAML for Typst output-formats
I want to use LaTeX packages in the Quarto YAML header for Typst output formats. A sketch of my YAML header is below. It seems that it doesn't work for \usepackage[none]{hyphenat}. The output shows ...
- 17.2k
Recommended answers
View all recommended answersThese answers have been recommended
1
vote
1
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Confused about lists in R?
I come from a Python background but have to learn R for a job, and I am confused about lists.
I understand named lists can be (roughly) equivalent to Python dictionaries, and I can look up elements ...
- 262k
Answer
Keep in mind the distinction in R between lists and vectors. In R, 1:4 is a vector. list(1:4) is a list of length 1 that contains a vector of length 4. as.list(1:4) is a list of length 4 where each ...
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1
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Using the approx function for several variables within 2 groups
I have a dataframe 'd' in which sex is 1/2 and age in days is 746 (~24.5 months) or 776 (~25.5 months)
d = structure(list(sex = c(1L, 1L, 2L, 2L), agemos = c(24.5, 25.5, 24.5, 25.5),
l = c(-0....
- 33.5k
Answer
fx doesn't need to interpolate sex, and it should probably return a data.frame. Then you can nest, mutate and unnest: fx = function(d){ fapp <- function(v) approx(d$agedays,v,xout=746:776)$y as....
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4
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dplyr identify rows that do not have a matched column within group
I have a df that looks as follow:
GROUP NAME TITLE LEVEL
A John Lead 0
A John Staff 1
A Jake Jr 0
B Bob Lead 1
B ...
- 77.4k
Answer
Within each name, there should be: At least one observation for each levels of LEVEL (0 and 1). At least one (length(...) != 0) TITLE among the LEVEL == 1 that is different (setdiff) from any of the ...
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Convert a dataframe of nearest neighbors to onehot coding
Let's say we took the mtcars data and ran a PCA. Then, we want to know which brands of cars are most similar in PC space, i.e. the nearest neighbors. So someone ran a nearest neighbors analysis, and ...
- 17.2k
Answer
as.data.frame.matrix(table(reshape2::melt(df, id = 1)[-2])) #> Fiat Honda Lotus Mazda Toyota #> Fiat 0 1 1 0 0 #> Honda 0 0 0 1 1 #> ...
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- 27.9k
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How to stop the run, and throw customized and original error messages using tryCatch in R?
I am trying to use tryCatch funciton to catch errors and stop runs with personalized and original error messages printed. The expression is to evaluate a+"T", which will surely produce an ...
- 33.5k
Answer
E.g. something like: a <- 1 res <- tryCatch( a+"T", error = function(e) cat("We get the following errors:\n", e$message) ) We get the following errors: non-numeric ...
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- 33.5k
See what's trending
View all trending questionsThese are the most active questions in R Language Collective
2464
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23
answers
468k
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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 ...
- 221k
1499
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21
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1.4m
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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(...
- 4,447
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30
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2.1m
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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?
- 2,997
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votes
25
answers
1.9m
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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 ...
- 39.7k
1545
votes
14
answers
1.8m
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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", 2), rep("Ohio", 1)))
...
- 1,205
Learn something new
These are the most recent articles in R Language Collective
41
votes
3k
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
19
votes
2k
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 ...
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