Recent questions tagged dataframe

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dataframe - web scraping data table with r rvest

I'm trying to scrape a table from the following website: http://www.basketball-reference.com/leagues/NBA_2016. ... Any help is much appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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621 views

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dataframe - R: coalescing a large data frame

Say I create a data frame, foo: foo <- data.frame(A=rep(NA,10),B=rep(NA,10)) foo$A[1:3] <- "A" ... foo$E, foo$F, foo$G, foo$H, foo$I, foo$J)) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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645 views

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dataframe - R: expand sequence of binary values from a time column

I have a table of time and binary values, > head(x,10) Time binary 1 358.214 1 2 359.240 1 3 360.039 0 ... . Any idea how to achieve this in R? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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611 views

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dataframe - Compare group of two columns and return index matches R

Many thanks for reading. Apologies for what I'm sure is a simple task. I have a dataframe: (Edited: Added ... How can I achieve the above? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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666 views

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dataframe - R object of data.frame and data.table have same type?

I am still very new to R and recently came across something I am not sure what it means. data.frame and data. ... 1] "data.table" "data.frame" See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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839 views

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dataframe - Apache Spark subtract days from timestamp column

I am using Spark Dataset and having trouble subtracting days from a timestamp column. I would like to subtract days ... without 13:17:39.900. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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873 views

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dataframe - Split a column into 2 in R

I have this dataframe CC.Number Date Time Accident.Type Location.1 1 12T008826 07/01/2012 1630 PD (39.26699, ... an object of class "character" See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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580 views

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dataframe - %>% .$column_name equivalent for R base pipe |>

I frequently use the dplyr piping to get a column from a tibble into a vector as below iris %>% .$Sepal. ... supported in RHS call of a pipe See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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dataframe - How to remove certain columns in multiple data frames in R?

lets say I have many data frames with different names of almost similar columns. How do I manipulate the columns ... all data frames at once. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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569 views

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dataframe - Strange behaviour dropping column from data.frame in R

I've encountered a strange behavior when dropping columns from data.frame. Initially I have: > a <- data.frame( ... or do I miss something here? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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670 views

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dataframe - r - insert row for missing monthly data and interpolate

I have a data frame as below with 5000+ rows. I am trying to insert a row where the month is missing e. ... 09 -5.0053745 Any help appreciated! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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843 views

1 answer

dataframe - R split column by fixed width

I have a dataframe where the date and time are mixed like this: ID <- c(1,2,3,4) DDMMYY <-c(100310,110310, ... 13 3 10 22 50 Any idea? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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674 views

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dataframe - R: Differences by group and adding

I would like to know how to do this operation simpler. Imagine I have a data.frame like this one: set.seed(1 ... by creating a paste() syntax. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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dataframe - remove outliers by group in R

In my dataset, i must delete outliers for each group separately. Here my dataset vpg=structure(list(customer ... categories of action variable. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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648 views

1 answer

dataframe - getting a sample of a data.frame in R

I have the following data frame in R: id<-c(1,2,3,4,10,2,4,5,6,8,2,1,5,7,7) date<-c ... way that all observations of the customers be extracted. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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581 views

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dataframe - Filter rows in R based on values in multiple rows

I'm trying to filter out multiple rows of data that I don't need in R but I'm not sure how to do it ... Dairy rows do have values above zero. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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dataframe - Multiply previous row value by constant R

Have a simple R question but cannot seem to find an answer: I have a data frame like this: assumption_val year 1 ... .2 to achieve this? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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768 views

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dataframe - Use of mutate in Summarise function using R

I have a dataframe like as shown below identifier date from to type shift_back_max shift_forward_max <chr> <date> < ... can help me, please? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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631 views

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dataframe - R) how to remove "rows" with empty values?

I have a weird data which contain a lot of empty values. test=read.table("test.csv", sep=",", header=T) ... result. What am i supposed to do? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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617 views

1 answer

dataframe - Elegant way to get no of days to prev and next year using R?

I have an R data frame like as shown below test_df <- data.frame("subbject_id" = c(1,2,3,4,5), "date_1" ... my output to be like as shown below See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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700 views

1 answer

dataframe - Split string by last two characters in R? (/negative string indices)

My data frame looks like: b <- data.frame(height = c(190,165,174,176), name = c('John Smith 34','Mr.Turner ... John Brown 31 How I can do that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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594 views

1 answer

dataframe - r data.frame create new variable

I have a dataframe with around 1.5 million rows and 5 cols. One variable (VARIABLE) is of this type NATIONALITY_YEAR ... , class = "data.frame") See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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676 views

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dataframe - Count of unique elements of each row in a data frame in R

I have a data frame like below: Group1 Group2 Group3 Group4 A B A B A C B A B B B B A C B D ... could provide a more elegant solution to this. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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670 views

1 answer

dataframe - How can I add rows to an R data frame every other row?

Brief: how can I add m rows to my m X n data frame, where each new row is inserted after each existing ... at the linked question is available. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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581 views

1 answer

dataframe - R: how to expand a row containing a "list" to several rows...one for each list member?

I am sure there is a simple solution to this, but i am going nuts trying to find it. Any help is very much ... = "data.frame") Kind Regards Mads See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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617 views

1 answer

dataframe - In R, why does selecting rows from a data frame return data as a vector if the data frame has only one column?

Suppose we want to access data from a data frame by row. The examples are simplified but when ordering a data ... many columns the frame has. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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655 views

1 answer

dataframe - R: adding 1 month to a date

I want to get the date sequence between a startDate and endDate by adding 1 month to the startDate. ie, if ... to get the correct output? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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682 views

1 answer

dataframe - R: merge based on multiple conditions (with non-equal criteria)

I would like to merge 2 data frames based on multiple conditions. DF1 <- data.frame("col1" = rep(c("A","B" ... DF1. Anyone has an idea on this ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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