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
39
votes
2k
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
Pinned
14
votes
1k
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 ...
- 101
Can you answer these questions?
View all unanswered questionsThese questions still don't have an answer
0
votes
0
answers
6
views
ggplot bar chart position = "identity" overlaying values with same number in wrong order
Hi –hoping we have some good tips out there!
I have encountered an issue with ggplot's overlaid bar chart, only when two values are the same. I have three columns of data, for yesterday, three day and ...
- 2,655
0
votes
0
answers
8
views
Colab Document R Session connecting to BigQuery Permissions
I'm trying to use an R runtime in a Google Colab document to pull data from BigQuery. A forum suggested that I use the BigRQuery package, but I have some questions regarding what's actually being ...
- 61
0
votes
0
answers
5
views
Optional Facet Argument for a Stacked Bar Chart in a Customized Function
I analyze survey data as part of my job responsibilities, so I often build matrices of statements with various scales (e.g., agreement, clarity, etc.) for respondents to answer. I already created ...
- 1
0
votes
0
answers
6
views
Shared memory in parallel foreach in R using set.seed
As seen in this question, in Windows it is not possible to run parallel processes with shared memory in R. Therefore, I have devised the following methodology, using a series of set.seed(), to ...
- 13
0
votes
0
answers
9
views
Finding polygon coordinates from the locality name in R
I have a list of locality names in Delhi, India. I want their corresponding polygons.
However, till now, I am only able to get their latitude and longitude.
Here is the code I am using
library(...
- 73
Looking for an extra challenge?
View all bountied questionsThese questions have a bounty on them
2
votes
4
answers
165
views
+50
Extract percentiles values from Scopus using R
I'm trying to get the Highest percentile value from Scopus for all the journals.
The URL is: https://www.scopus.com/sources.uri
This values is updated every year, so the value for each year is even ...
- 691
5
votes
0
answers
125
views
+200
How can I use a non-standard graphics device interactively?
The problem
When running R outside of RStudio, plots will by default be shown in a pop-up window, e.g. provided by the quartz device on macOS, the X11 device on Unix, the windows device on Windows.
A ...
- 2,516
Recommended answers
View all recommended answersThese answers have been recommended
1
vote
2
answers
20
views
Lag by n rows over specific columns while extending the lenght of dataframe
I am trying to shift down (lag) specific columns in a data frame by n rows (e.g. 2 rows). I have only found posts on lagging over specific columns by 1 row. Here is some mock data.
df <- data.frame(...
- 27.3k
Answer
library(dplyr) rbind(df, df[0,][rep(NA, 2),]) %>% mutate(across(-2, ~lag(., 2))) %>% `rownames<-`(NULL) #> A B C D #> 1 NA 8 NA NA #> 2 NA 9 NA NA #> 3 1 10 15 22 ...
View answer
- 27.3k
0
votes
2
answers
19
views
sort the gglikert chart based on the combination percentages in R
I came along the ggplikert() function in R from the ggsstats library here. They used sampling data and create a data frame called df. I am using the same as given in the link.(the df not the df_dk). ...
Answer
Accepted
Here is one possible option which uses reorder and an ifelse to reorder the variable mapped on y using the counts (aka the sum) of Strictly disagree and disagree answers. Under the hood ggstats::...
0
votes
2
answers
24
views
Filtering multiple columns by date range, and calculating maximum value
Dataframe
df <- structure (list(
subject_id = c("232-5467", "232-6784", "232-3457", "232-0987", "232-1245", "232-1945"),
...
- 30.1k
Answer
Agree that longer format of data is preferable. Here is one approach using tidyverse. After pivoting data, converting dates, and filtering, you can use slice_max to get the highest viral load for each ...
View answer
- 30.1k
0
votes
1
answer
21
views
R code for depression severity based on ICD-10 criteria
I am trying to come up with an R code for depression severity based on ICD-10 criteria with data from the MDI (Major Depression Inventory). This questionnaire consists of 12 questions (mdi_1, mdi_2, ...
Answer
Accepted
Instead of checking each possible condition you could use across() with rowSums() to determine the number of questions that fulfil the conditions regarding the minimum score or points. Then you can ...
1
vote
1
answer
39
views
Cross hatches with ggplot2
I'm trying to make a bar plot, and for the treatments that include insecticide, I want there to be cross hatches, but the code I currently won't work and I cannot figure out how to fix it.
Here is a ...
- 27.3k
Answer
Accepted
library(ggplot2) library(ggpattern) ggplot(peak.hillmeans1, aes(x = hill.number.type, y = hill.number.mean, fill = Subplot_Descriptions)) + ...
View answer
- 27.3k
See what's trending
View all trending questionsThese are the most active questions in R Language Collective
2466
votes
23
answers
463k
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 ...
CommunityBot
- 1
1501
votes
20
answers
1.4m
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(...
- 3,275
969
votes
30
answers
2.1m
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?
- 2,782
1039
votes
25
answers
1.9m
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 ...
- 38.6k
1541
votes
14
answers
1.8m
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", 2), rep("Ohio", 1)))
...
- 50k
Learn something new
These are the most recent articles in R Language Collective
39
votes
2k
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
16
votes
1k
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 ...
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