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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
Pinned
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
Can you answer these questions?
View all unanswered questionsThese questions still don't have an answer
0
votes
0
answers
11
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Error using mcp2atm function for robust pairwise comparisons - undefined columns selected
I used a robust two-way ANOVA using the WRS2 package (R v.4.4.1), using the following code as suggested by Mair and Wilcox (2020) - the full dataset is on the bottom of this message:
library(WRS2)
...
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0
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How to get predicted probabilities of being in each class of three using xgboost in R?
I am trying to train a xgboost model using iris dataset. The training code is shown below, and both prediction functions produce the same results. However, the length of the results is 135, while ...
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Predicted values in a Tweedie GLM-model
I need help with how to create an actual vs predicted plot for a Tweedie GLM model in R where weights are used.
I have a Tweedie GLM model in R where I have derived the coefficients/factors for a risk ...
- 139
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How to speed up R dist matrix for hierarchical clustering for large matrix input data?
I have a large matrix (approximately 35,000 x 35,000) and I'm preparing a distance object in R for hierarchical clustering. The base R function dist() is too slow, so I'm using the distances function ...
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I want to colorize the points of a Shapviz dependence output acording to the variable
I have been trying to change the colors of the points on each variable, but even though i've tried using scale_x_discrete, by and changing the colors, or using scale_color_manual(), nothing works for ...
Looking for an extra challenge?
View all bountied questionsThese questions have a bounty on them
4
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0
answers
91
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+100
When extending ggplot2, how should I apply scaling functions per group instead of as a whole?
I'm working on a new geom for ggplot2 that allows the user to alter the tint and shade of the colors by mapping it to an aesthetic. (If someone knows of a place this has already been implemented, ...
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+50
Issues connecting odbc in newest R Studio update
I recently updated R Studio and odbc/dbi seems to be broken. Running packageVersion("odbc") I see:
[1] ‘1.5.0’ Warning message: package ‘odbc’ was built under R version 4.4.1
My current ...
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+50
lintr no visible binding for global variable ‘.SD’
lintr throws error while using data.table functions like .SD, .SDcols, e.g:
/path/readData.R:130:29: warning: no visible binding for global variable ‘.SD’, Did you mean 'SSD'?
DT[, "row.sum" := ...
- 30.1k
Recommended answers
View all recommended answersThese answers have been recommended
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1
answer
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Produce table with data bars in base R or ggplot2
I am looking to make a table with horizontal bar graphs in each cell to display continuous numeric data with 2 categorical independent variables. It would look similar to the below (fictional data):
...
- 169k
Answer
Accepted
I think I would just create this as a faceted ggplot: library(tidyverse) holiday_accommodation %>% pivot_longer(-Region, names_to = 'Accommodation type') %>% mutate(`Accommodation type` = ...
View answer
- 169k
1
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1
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Pattern fill in highcharter bar chart
I would like to create a column or bar chart with pattern fill in an R shiny app. It seems to me that highcharts and related highcharter package should be able to do the job, but I could not find a ...
Answer
Fill patterns are implemented in a separate module which you have to add as a dependency using hc_add_dependency("modules/pattern-fill.js"): library(highcharter) #> Registered S3 method ...
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move inset plot legend
I have an inset plot with a legend that I want to be shown at the bottom of the overall figure. This legend isn't the same for the larger plot, since I added more layers to the inset plot. How can I ...
Answer
One option would be to add a legend to your main plot for which I use a fake invisible geom_point and remove the legend for your inset plot. As I don't have your dataset dat.eez.usa1 I simply used the ...
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How to adjust x axis in coefficient plot with sjPlot's plot_model when x value range is smaller than -1,1?
I'm plotting multiple regression coefficients with plot_model and the x axis is automatically set to -1,1 even though the possible range of my values is smaller, which makes the estimates hard to see ...
Answer
As plot_model uses coord_flip under the hood you have to set the limits= for the "x" axis using scale_y_continuous: library(sjPlot) #> Learn more about sjPlot with 'browseVignettes("...
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Ploting weekly data with base::plot with unique and evenly spaced labels
I am trying to create a simple scatter plot, so weeks on the x-axis and "cases" on the y with each indicated by a dot and note I can only use base R's plot(), no ggplot.
I have data with 156 ...
- 28.2k
Answer
Accepted
We can use seq.Date and axis.Date: plot(exampledata$Date, exampledata$Cases, main="Weeks by Cases", ylab="Cases", ylim=c(500000,900000), xlab="", ...
View answer
- 28.2k
See what's trending
View all trending questionsThese are the most active questions in R Language Collective
2464
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23
answers
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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 ...
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1500
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22
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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(...
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30
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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?
- 2,998
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25
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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 ...
- 39.8k
1547
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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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