All Questions
903 questions
0
votes
2
answers
114
views
Keep file names merging list with lapply? [duplicate]
I am importing several .csv files of temperature registers from a folder, and need to create a single table mergind them all, in which the first 15 lines must be skipped and the file names must be ...
- 111
2
votes
3
answers
67
views
use for loop to rbind dataframes of different sizes
I'm new writing for loops, but this dataset is too large to do this one by one (though open to suggestions). I have a list of dataframes (A), and I am trying to rbind each of them to specific, ...
1
vote
1
answer
89
views
Speed up R function that combines linestrings into a single linestring [closed]
I have a function that i run on a large dataset that gets incredibly slow as rows are being incorporated. Is there a better way to run this function to speed up processing time? The function combines ...
- 460
0
votes
0
answers
42
views
Error in summary(model_component)$coefficients : $ operator is invalid for atomic vectors
there is a model.results list which has multiple elements and sub elements in it.
Here using this list trying to extract certain values and convert into proper format for storing purpose.
Below is ...
- 11
0
votes
3
answers
62
views
Bind each dataframe in a list to each dataframe of another list
I have two lists composed of dataframes (in the example 3 dataframes per list). I would like to bind the rows of dataframes of the two lists.
I was thinking to couple rbind() with Map(), map() or ...
- 478
1
vote
3
answers
106
views
R bind two data frames with different time observations
I have two data frames f1 and f2
row11 <- c("a", "c", "2000", "2001", "2005")
row12 <- c("", "", 7, 10, 15)
f1 <- as....
- 303
1
vote
2
answers
51
views
how filter a dataframe to remove rows in which no column contains a value higher than X or lower than Y
I am trying to remove any rows of data that do not contain any values that are greater than 5 or less than -5 in order to exclude them from my data analysis. I could not find a way to use an OR ...
- 21
1
vote
0
answers
40
views
Is there a clean way to call stepfun many times to generate a matrix?
MWE:
library(stats)
months <- 1:12
months_plus_one <- months |> append(months[length(months)] + 1)
hours_list <- lapply(months_plus_one, \(m)(stepfun(c(m), c(0, 50))(months)))
hours <-...
- 8,773
0
votes
0
answers
28
views
Adding second set of points to pairs2 plots
I’m hoping that there is a simple answer to this question - is there a way to plot a second set of points on top of pairs2 plots, from a second dataframe?
This question was somewhat answered here ...
- 13
0
votes
1
answer
144
views
Reading JSON files in R and creating a dataset
I am trying to create a dataset in R from 3k JSON files.
(This is the data: Nauman, F. (2023). Clothing Dataset for Second-Hand Fashion (Version 1) [Data set].Available at: Zenodo. https://doi.org/10....
- 13
0
votes
1
answer
35
views
Organising list() of a calculated function by descending day order within patients in R
I'm trying to calculate the time in bed (TIB) for a dataset containing a lot of data, among which the time they went to bed (inbed) and the time they got out of bed (uitbed). The code I have works in ...
0
votes
1
answer
191
views
Is there an R function for binding two tables next to each other but having a title over the whole thing?
I have been using the gt package in R to create tables for a paper. I have been using rbind to stack the two tables on top of each other but would rather they are next to each other with one title ...
- 3
-1
votes
2
answers
60
views
R cbind two dataframes of different length throwing error invalid 'nrow' value (< 0)
I am trying to cbind two dataframes of different lengths.
Category = c("New", "New","New","New","Old","Old","Old","Old",
...
- 550
3
votes
2
answers
65
views
R How to calculate the sum of existing rows to add new rows of data
How do i add a new Category into comb_df
where the value of this new
newcat is sum of
Category = New Jan 2014 + Category = Old Jan 2014
Category = c("New")
value = c(4,7,6)
Date= c ("...
- 550
0
votes
0
answers
46
views
merging .csv files with different number of variables in R
I have an R code which takes a set of .csv files and put all of them together.
files <- list.files()
for(i in 1:length(files)) assign(files[i], read.csv(files[i],header=F,stringsAsFactors=F,na....
- 43
0
votes
1
answer
91
views
Why does rbind change one value when appending to a data frame?
I am working with vectors of datetimes and time zones. A few of the time zones were recorded incorrectly and I want to adjust the times to fit the correct time zone. I want to output a data frame. ...
0
votes
0
answers
57
views
Creating function to group data with %like% pipeline giving errors
I am trying to create a function that will take data with a description column, match a phrase in that column (using %like% from the data.table package), and add a grouping variable with a group name.
...
2
votes
4
answers
107
views
Why does R colnames ignore the vector with specified names and only pay attention to the index?
I came across some weird behavior in R. Imagine that I have this data frame, and I want to change the names of the columns by using colnames and a vector:
df <- data.frame(a = seq(1,10), b = seq(11,...
- 37
2
votes
1
answer
238
views
Convert nested lists to a dataframe in R
My goal is to convert the nested lists produced by my code into a dataframe. I have the following which extracts some data from several urls in a loop and stores them in lists.
library(rvest)
library(...
- 345
1
vote
1
answer
64
views
Fast way to create dataframe in a rbind() style
I have two survey datasets I'm working with. The first one (survey1) is a population/household survey (like the American CPS or the European EU-SILC) with around 150,000 observations; the second one (...
1
vote
2
answers
42
views
rbind 2 data frames by the elements in 2 columns, avoiding nested loops
I have two data frames like the following:
df1 <- data.frame(Marker1=c('+','+','+','-','-'), Marker2=c('+','+','+','+','-'), Marker3=c('+','-','+','-','+'),
Sample=c(1,1,2,3,3), ...
- 3,197
0
votes
2
answers
103
views
How to improve the speed of rowbinds when the size of the final dataframe is unknown
I want to rowbind multiple dataframes each with a varying number of rows. I understand that using a for loop in which something like a final_df is overwritten in each iteration is very slow as R has ...
- 181
1
vote
2
answers
78
views
c-/r-bind from a list of data tables w/o recycling and w/ using list names as part of col names
there many post which shed some light on individual parts of my problem but I can't puzzle it together and need help. I'm trying to bind many data tables with varying row-count but identical column-...
- 320
0
votes
2
answers
178
views
rbindlist with different variable names / positions in R: Creating an output dataframe/file
I have a question that is a combination of two different posts.
Combine (rbind) data frames and create column with name of original data frames
Compare the column names of multiple CSV files in R
I am ...
- 71
1
vote
0
answers
82
views
Missing data files in R
I use R bind to combine multiple files into 1 df. When I close R, about 6 of those files disappear from my environment. The code is still saved with those file names in the script where I type the ...
0
votes
1
answer
55
views
Using for loop to combine a filter and rbind to a new data frame
Raw file
I have data as shown in the image, I want to filter the data by the year column, while ensuring that the months are continuous as in the picture below
filtered file, the format I want
I ...
2
votes
1
answer
95
views
I want to rbind 2 rows but without overlapping rows in R
I have data1 and data2.
data1 <- data.frame(date = c(123, 124, 125, 126),
peter = c(10, 11, NA, NA),
turner = c(20, 21, NA, NA))
data2 <- data.frame(date ...
- 369
1
vote
1
answer
51
views
Modify the code of dataframes for multiple txt files
Following code is for dataframes df1, df2. The code is reading the data columns (var) and look in each dataframe, if the var column is not present, it adds it and put NA in that particular column.
...
0
votes
2
answers
143
views
Unable to obtain: Columns missing in one input file but present in other files should return NA in output file
I have various txt files, where each file contains multiple columns but not all columns are present in all the files.
For example,
Columns of Txt File1
D/T City_Name Temp Pres Wind_Hor Wind_Ver ...
0
votes
0
answers
56
views
How to add a new column in output csv with name derived from input file?
I have multiple txt files stored in different folders. 1 folder for each city. Each txt file contains data at an interval of 5 minutes. I run following code to obtain daily data successfully.
for (idx ...
0
votes
1
answer
37
views
do.call(rbind, ... ) exhibits unexpected behaviour inside a loop
I'm trying to download some data and have the following
library(RJSONIO)
first.day <- as.Date(paste0("202201","01"), "%Y%m%d")
today <- Sys.Date()
months <- ...
- 103
0
votes
2
answers
53
views
how to extract rows which match based on two conditions from two dataframes
I have two dataframe one is snp region and other is Hic region.
dput(hic_region[1:15,1:4])
structure(list(rf1 = c(57584944, 57584944, 57584944, 57584944,
57584944, 57584944, 57584944, 57584944, ...
- 129
0
votes
1
answer
136
views
How to use Rbind when datasets I am using have different names in the variables, but they each mean the same thing
I am having a hard time combining these datasets and it's because the names of the variables are different. How would I do this?
[I want to combine this, but the response I get from R is "Error ...
0
votes
1
answer
126
views
How to match column names across two dataframes and add a new variable?
data <- rbind(c(1,2,3,4,5,6),
c(1,2,3,4,5,6),
c(1,2,3,4,5,6))
colnames(data) <- c("A", "B", "C", "D", "E", "F&...
- 57
0
votes
1
answer
57
views
how to select rows in which there is more than 1 value across columns
I have a dataframe:
dput(gene1[1:5,1:5])
structure(list(en_Adipose_Subcutaneous.db = c(0.0531016390078734,
-0.00413407782001034, -0.035434632568444, 0.00968736935965742,
0.0523714252287003), ...
- 65
-1
votes
1
answer
25
views
Combine more than 3 data.frames while keeping the extra-rows from the master file that didn't match
I have the following data.frame "A" in R:
ID
1
456
200
550
110
and the following data.frame "B" defined in R
ID
Interaction
Student
Date
1
email_sent
Isabel Gauss
10/20/...
- 15
1
vote
1
answer
60
views
error while using rbind function in R: add the same rows multiple times
I have a dataframe in R:
dput(trans_eqtl[1:5,1:6])
structure(list(Gene = c("ENSG00000166086", "ENSG00000166086",
"ENSG00000265688", "ENSG00000265688", "...
- 65
0
votes
1
answer
110
views
rbind two different data frames that have different column names
I want to rbind two different data frames that have different column names
DF1 has 4 columns
Year
Month
Prec_CAN_45
Prec_CAN_85
2015
Jan
0.5
0.65
2100
Jan
0.6
0.75
DF2 has 3 columns
Year
Month
...
- 87
0
votes
2
answers
49
views
Is there a way to stack dataframes in an rbind fashion where there is a single different column name in R
Is there a way to stack dataframes in a row wise fashion. Consider the following code
motors <- c("audi", "honda", "ford")
age <- c(1, 2, 3)
motors1 <- motors
...
- 115
0
votes
3
answers
212
views
Want to use grep to get dataframe names from environment and then stack the rows with rbind function in R
I have thousands of dataframes and want to grep their names into a character vector. Then use the vector to complete the rbind function. Any suggestions?
dat1lkq6 <- data.frame(color = c('COLOR: ...
- 63
0
votes
0
answers
1k
views
How to merge two different vcf files with different samples' number on R?
I have two different vcf files with snps from different samples (119 samples in vcf file n1 and 21 in vcf file n2).I'd like to have a single vcf file with same meta and combined fixed and gt region.
I ...
1
vote
2
answers
464
views
Append same values to multiple columns of a data.frame
I have a short vector of values:
five_values <- (c("17", "93", "119", "399", "439"))
and a dataframe:
df <- data.frame("Col1" = ...
1
vote
1
answer
235
views
Combining two data frame date columns into one column - in order
My temperature data had missing values that I needed to fill in, however when I went to rbind the new Date values from the newly made dataframe of missing dates, it ended up on the bottom of the ...
- 11
0
votes
0
answers
33
views
Keep the identifier for each row in a rolling window of functions R
I have managed to apply a rolling window of functions per column of my accelerometer data where each row is associated with a behaviour. However, the output doesn't include the behaviour associated. ...
- 13
0
votes
2
answers
42
views
In R, rbind dataframes repeting only some elements
I have 4 dataframes (df, df1, df2 and df4) and I want to create df3.
df <- data.frame(
Date = c("28/04/2010", "26/09/2010"),
HolidayType = c("MUNICIPAL", "...
- 160
0
votes
1
answer
68
views
Condensing wide dataframe with columnwise operations
I'm still learning R and was wondering if I there was an elegant way of manipulating the below df to achieve df2.
I'm not sure if it's a loop that is supposed to be used for this, but basically for ...
- 51
1
vote
1
answer
56
views
feeding a list of objects to rbind.fill
I have a large number or tables in the environment I wish to bind into a single table. There are many tables in the environment, but all the ones I want to bind are similarly named ending in "...
- 169
0
votes
0
answers
39
views
how to keep on adding rows to the dataframe
I am running a loop through all the genes present in my datasets and creating a matrix.
The matrix columns is 49 and rows will depend upon rsid.
I want to create one big matrix in which all the genes ...
- 65
0
votes
1
answer
101
views
Create clean data frame in R from list generated by ocr
I have a table I imported into R using the ocr function from tesseract which I need to format into a table that can be used to create graphical representations from.
I have done a bunch of different ...
- 399
0
votes
1
answer
62
views
Subset large dataframe over distinct singular character variable column value
I'm still learning R and was wondering if I there was an elegant way of manipulating the below df to achieve df2.
I'm not sure if it's a loop that is supposed to be used for this, but basically I want ...
- 51