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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
17
votes
2k
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
5
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Remove extra measurements within specific brackets per ID in R
I have a long dataset in which each participant should have 9 measurements, but they all have more than 9.
These measurements need to be within specific brackets of the Weeks variable.
Measurement 1 ...
- 133
0
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0
answers
8
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Using rgl's extrude3d() function to make a 3D mesh from polygons in R
I'm trying to make a 3D OBJ file using R. My initial data is a Geopackage with multiple polygons. And I want to 'extrude' each polygon to make them 3d. The extrude amount should be determined by the ...
- 1
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R Synthpop - Unable to write rules to ensure float1 <= float2 <= float3
I have been banging my head against synthpop rules for a few days now and I can't quite understand the documentation for defining rules. I needed float columns to obey these rules: float1 <= ...
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0
answers
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Different outputs of marginaleffects::avg_prediction and ggeffects::ggeffect in R
I am running multinomial regression using nnet::multinom for a dataset where response and predictors are all factors. A sample of my data:
df2 = structure(list(SOURC = c("dsint", "dsint&...
- 343
0
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0
answers
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Use SMD or raw difference in proportions when comparing balance of binary covariates used in propensity matching?
I am a junior in the medical field, and have been tasked with performing a propensity matched analysis of some data, using R.
I am looking at comparing the balance of my covariates (both before and ...
- 7,965
Looking for an extra challenge?
View all bountied questionsThese questions have a bounty on them
1
vote
1
answer
39
views
+50
ROracle installation errors on EL8
I am trying to install ROracle package version 1.3-1.1 on R version 4.4.1. The OS is RHEL 8.9, kernel 4.18.0-513.24.1.el8_9.x86_64. I've installed Oracle client 23 including JDBC, ODBC and all ...
- 1,336
3
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1
answer
74
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+100
SparkR: creating a Spark table with a nested data column
I'm working in Databricks trying to push data from an R notebook to Apache Spark where one column is nested data. Here's a working example without the nesting:
library(SparkR)
sparkR.session()
d1 = ...
- 7,877
Recommended answers
View all recommended answersThese answers have been recommended
0
votes
1
answer
9
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Trying to create a grouped barchart in R - producing a stacked one instead
I am trying to create a bar chart that has the number of each species grouped into years. I want each year represented on the x axis with the number of each of the 3 species grouped next to one ...
- 114k
Answer
As the variable mapped on fill is a numeric aka continuous variable you have to convert to a discrete or categorical variable using e.g. factor or explicitly map on the group aes: library(ggplot2) ...
View answer
- 114k
1
vote
2
answers
31
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Display all levels in legend of ggplotly object
How do I display all legends in R ggplotly? As of now it only displays the legends for matching data.
Here is what I have done so far:
library(ggplot2)
library(plotly)
schoolname <- c("Xavier&...
Answer
We can add a dummy row (schoolname == NA) with "Excellent" rating, then that level is shown in the legend without getting plotted. Moreover, you had a typo where your levels in cut() did not ...
4
votes
5
answers
86
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Convert a list into a tibble with nested columns
I would like to convert a list like this into a tibble.
lst <- list(
"A"=list(
"Category"="A",
"Team"=c("x"),
"City"="...
- 11.9k
Answer
Perhaps something like: list_transpose(lst, default = NA, template = unique(unlist(map(lst, names)))) |> as_tibble() |> mutate(across(where(is.list), \(l) if (all(lengths(l) == 1)) unlist(...
View answer
- 33.6k
0
votes
2
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22
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Pad column numbers while using separate_wider_delim in R
I have a dataset in R that contains a column that contains a string that I want to separate into multiple columns using separate_wider_delim from the tidyr package.
What I want to do is to pad the ...
- 33.6k
Answer
You can specify the names, e.g. like so: df %>% separate_wider_delim( fruits_selected, delim = "+", names = sprintf("%02d", 1:3), names_sep = '_' ) If ...
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- 33.6k
2
votes
2
answers
48
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How to add semicircles overlying geom_point in ggplot2
I am trying to generate a dotplot that shows changes in virus infection over time in multiple individuals. More than one virus can be detected, and I want each virus to have its own color in the ...
- 114k
Answer
A more elaborated option would be to use some custom shapes. The approach below builds on this answer by @AllanCameron (which I already applied here) and this answer by @Baptiste to create the custom ...
View answer
- 114k
See what's trending
View all trending questionsThese are the most active questions in R Language Collective
2464
votes
23
answers
468k
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 ...
- 222k
1499
votes
21
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(...
- 4,447
975
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30
answers
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
1043
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 ...
- 39.7k
1545
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)))
...
- 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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