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View all 2 articlesR Language admins have deemed these posts noteworthy.
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37
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
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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Perpetually running error "Error: cannot have attributes on a CHARSXP"
I am a bit at a loss. I am now revisiting some script that I used multiple times before, which involves stringi, stringr, dyplr, data.table packages.
In the past it ran like a charm. Now however I ...
- 13
1
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0
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Embedding plotly (r) graph on website, updating through API call?
My question: I am wondering about embedding a plotly bar graph in a website. The graph would pull data from an API call, cached (so it calls a maximum once a minute). I'm assuming this is possible, ...
- 11
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Using two data frames in R to determine the diameter size
So I have two data frames. I'm trying to use smps_8 as the particle value that I am trying to find on the smps_7 for each of the different days. For example, in smps_8, the column c2014-09-30 19:00:00 ...
- 7,837
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0
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Obtaining corr matrix (probit residual correlations) for observed variables after fitting an EFA model using lavaan
Looks like lavaan's efa() function does not have an option to generate the correlation matrix for observed variables. I wonder how can I obtain the corr matrix (probit residual correlations) for ...
- 546
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0
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How to make an R Shiny app with big data?
I'm trying to create a simple R Shiny app that takes the chromosome, start, and end positions of CpGs as inputs and outputs boxplots for each CpG within the range. It works fine on the subset of data ...
- 423
Looking for an extra challenge?
View all bountied questionsThese questions have a bounty on them
4
votes
2
answers
99
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+50
Why do some of the geom_text labels flipped when added on a dodged geom_col?
I have the following dataframe df:
df <- structure(list(ID = c(1, 1, 2, 2, 3, 3, 4, 4), Group = c("A",
"B", "A", "B", "A", "B", "B&...
2
votes
1
answer
372
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+50
version requested doesnt match
I'm trying to use selenium package but I get an error.
chromever <- "113.0.5672.64"
chromedriver <- ".../chromedriver.exe"
driver <- rsDriver(browser = "chrome",...
- 1,655
Recommended answers
View all recommended answersThese answers have been recommended
0
votes
2
answers
33
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Convert the time intervals to equal hours and fill in the value column
I have data with this structure (YR weather forecasts)
df1 <- read.table(text = "time temperature
00 0
01 0
02 1
03 1
04 2
05 2
06 2
07-13 3
13-19 4
19-01 1", header = TRUE)
I want to ...
Answer
Accepted
Since you're discarding things after 11pm, we can do this: library(dplyr) library(tidyr) # unnest doseq <- function(z) { z <- as.integer(z) if (length(z) > 1) { if (z[2] < z[1]) z[...
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1
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loading .dat into R, no column names
I am having trouble reading a large .dat file into R.
I am using
data <- read.table("...2018029_ascii/FRSS108PUF.dat", fill=TRUE)
This results in a large dataframe with V1, V2 as column ...
- 67.1k
Answer
That is not a "something"-delimited file, it's fixed width. readLines(unz("~/Downloads/2018029_ascii.zip", "FRSS108PUF.dat"), n=3) # [1] "100011331 1 1 1 1 2 1 2 2 2 ...
3
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2
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28
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How to evaluate the probability of a range in R?
Supposed I toss 10 dice many times (let's say, 10000 times), and I want to know the probability of the sum on 10 dice falling into a range (10 to 20, 20 to 30, ..., 50 to 60). How can I divide the ...
- 67.1k
Answer
If you create a table of dice.sums, then you will get the frequency of each possible sum. Dividing this table by its total will give you the probability of each sum. The rest is just data wrangling to ...
View answer
- 167k
0
votes
1
answer
20
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How can I add a grob for both the x and y axis using cowplot?
I found how to easily insert pngs as axes tick labels, following this post.
However, this seems to work only for a single axis. I am not quite sure how to draw both my y axis and x axis grob to my ...
Answer
One option to add images to your axis text would be to use the ggtext package which allows to add images to the axis text using an <img> and by using ggtext::element_markdown() for the axis ...
1
vote
1
answer
33
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I can not load sf in docker
I'm deploying an application (on docker) that is totally dependent on sf but I'm having trouble loading it into docker :
FROM rocker/shiny
#Make a directory in the container
RUN mkdir /home/shiny-app
...
Answer
Accepted
When you want to add R packages to a new OS running R, you need to be aware of any underlying OS packages that are required. In this case, reading sf's DESCRIPTION, we see SystemRequirements: GDAL (&...
See what's trending
View all trending questionsThese are the most active questions in R Language Collective
2466
votes
23
answers
461k
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
1498
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
967
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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?
- 2,623
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 ...
- 38.5k
1540
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)))
...
- 49.9k
Learn something new
These are the most recent articles in R Language Collective
37
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 ...
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