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View all 3 collectionsR Language admins have deemed these posts noteworthy.
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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
0
votes
0
answers
9
views
Adding nested lists using xmlrpc2 package
I'm trying to integrate R with Odoo using the XML-RPC API and the xmlrpc2 package in R. When trying to get the result from the response using result <- from_xmlrpc(content(response, as = "text&...
- 105
0
votes
0
answers
17
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1-D flow model in lsode in r
I want to create a very simple stream model in R for demonstration purposes, and I want to use the deSolve package to keep things fast. What I would like to do is have a vector of each concentration ...
- 1
0
votes
0
answers
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ggsurvfit Kaplan Meier risk table customisation
Does anyone known how to customize the risk table below the plot using ggsurvfit such that for one cohort all the values are set to NC (not calculated) instead of the N at risk that is presented ...
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votes
0
answers
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Exit swirl in the middle of a cmd_question
I know I can exit swirl by typing bye() but this doesn't work when I have a cmd question that is waiting for my input. In this case it works as "normal R" and if I type some of the keywords ...
- 149
0
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0
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Extracting WAIC using rjags::jags.samples() from single chain of bayesian model run in parallel with JagsUI
I am using JagsUI to run many single and multi-predictor models, using the autojags() function to run them until convergence. I would like to do model selection using WAIC, rather than DIC. The JagsUI ...
- 15
Looking for an extra challenge?
View all bountied questionsThese questions have a bounty on them
0
votes
1
answer
66
views
+50
Spectral interpolation of Sentinel-2 in r
I have sentinel-2 data of few months. I am trying to interpolate sentinel-2 image using values from nearest dated image. The problem is that the code is quite inconsitent. It sometime replace the ...
- 48.3k
2
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0
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165
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+150
Optimizing a complex, custom data problem - find the optimal polygon that contains a give fraction of data, with constraints
I am working with Uranium-Lead geochronological datasets. This type of data is typically interpreted in what is called a "Wetherill" concordia diagram, an x-y coordinate space where each ...
- 130
Recommended answers
View all recommended answersThese answers have been recommended
0
votes
1
answer
25
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Create plot with variable height in facet_wrap
I want to reproduce this graph:
From the following paper: https://www.journals.uchicago.edu/doi/10.1086/730711
I have used facet wrap, but it does not have variable heights. Facet grid would not work ...
- 128k
Answer
One option to achieve your desired result would be to use a combo of ggforce and patchwork. First, split your data by columns. Then create a facetted plot for each column using ggforce::facet_col ...
View answer
- 128k
1
vote
2
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In ggplot2 how can I display in single legend the line color and point shape mapped to vector of single-character strings?
Haven't found any post that address this issue specifically.
In the following chart I'd like to use a column of single-character strings as the shapes for geom_point(). The help vignette ggplot2-specs ...
- 29.7k
Answer
Accepted
We can map the shape to cyl_word and force manual shapes: ggplot(mtcars2, aes(mpg, wt, color=cyl_word)) + geom_line() + geom_point(aes(shape=cyl_word), size=3) + scale_shape_manual(values = ...
5
votes
4
answers
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Efficient method to estimate the group membership
I have below code to estimate the group membership of each element of a large vector
Interval = data.frame(lowerLimit = c(0, c(13.31, 14.1, 14.52, 15.9, 17.88, 20.85, 22.14, 22.6, 23.49,
24.31, 26.54,...
Answer
If efficiency is at stakes, and the Interval is not necessarily contiguous, then we can write our own {Rcpp} function: library(Rcpp) library(inline) findIntervalGroup <- cxxfunction( signature(...
View answer
- 29.7k
1
vote
1
answer
34
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Change colour of text that labels a tile in ggplot2
This question follows on from this one (Warning message: Removed 2 rows containing missing values (`geom_tile()`)). Some of the days are weekend days and I would like to communicate this in the chart. ...
Answer
Accepted
I think your second code block ("Answer:") is a good approach, though you may run into problems when a fill is light enough that white lettering on the weekends will be washed out. An ...
0
votes
3
answers
85
views
Drop rows with missing values in all columns [duplicate]
It looks like tidyr's drop_na will drop rows if any of the specified columns contain missing values.
Example:
> library(tidyverse)
> df <- data.frame(a=c(1,NA,2,NA), b=c(3,4,NA,NA))
> df
...
- 29.7k
Answer
I usually recommend collapse::na_omit for that. The oddly-specific prop argument will remove rows with a proportion of missing values >= prop. It's the fastest and most flexible option: collapse::...
View answer
- 52.6k
See what's trending
View all trending questionsThese are the most active questions in R Language Collective
2464
votes
23
answers
483k
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 ...
- 74.7k
1511
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21
answers
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(...
- 2,918
988
votes
30
answers
2.2m
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?
1050
votes
25
answers
2.0m
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 ...
- 41.9k
1570
votes
14
answers
1.9m
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&...
- 2,918
Learn something new
These are the most recent articles in R Language Collective
49
votes
4k
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
20
votes
3k
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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