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Recent questions tagged Dataframe

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dataframe - finding the index of a max value in R

I have the following data frame called surge: MeshID StormID Rate Surge Wind 1 1412 1.0000E-01 0.01 0.0 2 ... I'm VERY new to R programming. See Question&Answers more detail:os...

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

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556 views

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dataframe - Extract name of data.frame in R as character

How can I extract the name of a data.frame in R as a character? For example, if I have data.frame named df, ... get "df" as a character object. See Question&Answers more detail:os...

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

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678 views

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dataframe - Using grep in R to delete rows from a data.frame

I have a dataframe such as this one: d <- data.frame(cbind(x=1, y=1:10, z=c("apple","pear","banana"," ... is not present. How to go about 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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684 views

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dataframe - efficiently locf by groups in a single R data.table

I have a large, wide data.table (20m rows) keyed by a person ID but with lots of columns (~150) that have ... do this in R using data.table. 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 Spark scala explode json array

Let's say I have a dataframe which looks like this: +--------------------+--------------- ... .col("Payment"))) Any help is greatly 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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574 views

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dataframe - How to delete rows from a data.frame, based on an external list, using R?

This might be an easy question but i still need some help for using R. I have a data.frame (main_data), lets say ... R? Thanks in advance.. :) See Question&Answers more detail:os...

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

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665 views

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dataframe - R subtract value for the same ID (from the first ID that shows)

I have a similar question to the question found here: R, subtract value from previous row, group by (slight ... Thank you for your help! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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883 views

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dataframe - how to run lm regression for every column in R

I have data frame as: df=data.frame(x=rnorm(100),y1=rnorm(100),y2=rnorm(100),y3=...) I want to ... for each column using the above command. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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790 views

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dataframe - Runnning Spark on cluster: Initial job has not accepted any resources

I have a remote Ubuntu server on linode.com with 4 cores and 8G RAM I have a Spark-2 cluster consisting of ... the same problem? Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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528 views

1 answer

dataframe - How can i add multiple columns in Spark Datframe in efficiently

I have set of columns names and need to add those columns in existing dataframe which is also very huge in size, i need to ... ----+----+-----+ See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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352 views

1 answer

dataframe - overlapping the predicted time series on the original series in R

I perform forecast w=read.csv("C:/Users/admin/Documents/aggrmonth.csv", sep=";",dec=",") w #create time series ... row.names = c(NA, -24L)) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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617 views

1 answer

dataframe - Dividing each cell in a data set by the column sum in R

I am trying to divide each cell in a data frame by the sum of the column. For example, I have a data frame ... column sum. Thanks for the help! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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523 views

1 answer

dataframe - Summing rows by month in R

So I have a data frame that has a date column, an hour column and a series of other numerical columns. Each row ... know how I can do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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433 views

1 answer

dataframe - Replace values in data frame based on other data frame in R

In the below example, userids is my reference data frame and userdata is the data frame where the replacements should take ... 3 4 bar 3 26 2 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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548 views

1 answer

dataframe - Add an image to a table-like output in R

I have a simple data structure: cases are countries and for each country I have a couple of numeric ... larger document created with knitr) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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578 views

1 answer

dataframe - Faster way to subset on rows of a data frame in R?

I have been using these 2 methods interchangeably to subset data from a data frame in R. Method 1 subset_df <- df[ ... one is safe to use then? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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581 views

1 answer

dataframe - In R, how do I subset a data.frame by values from another data.frame?

I have two data frames. The first, df.1, contains two columns of paired numerical identifiers, where each column ... 1$A, df.1$B or both. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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958 views

1 answer

dataframe - R convert between zoo object and data frame, results inconsistent for different numbers of columns?

I have difficulty switching between data frames and zoo objects, particularly keeping meaningful column names, and ... column name somehow. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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723 views

1 answer

dataframe - R: losing column names when adding rows to an empty data frame

I am just starting with R and encountered a strange behaviour: when inserting the first row in an empty data ... filled up with its results. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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599 views

1 answer

dataframe - R creating a sequence table from two columns

I have a table as below product=c("a","b","c") min=c(1,5,3) max=c(1,7,7) dd=data.frame( ... is there any package which would give quick results? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

570 views

1 answer

dataframe - counting the number of values greater than 0 in R in multiple columns

I have a dataset myDF in R with a the variables L1,L2,L3,L4. How can I get the number of observations in L2, ... L2, L3, and L4 greater than 0. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

594 views

1 answer

dataframe - Identifying where value changes in R data.frame column

I have a data.frame in R where the value column contains data of the class character. I want to identify the row ... 300 9 9 400 10 10 400 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

738 views

1 answer

dataframe - Merge multiple variables in R

I have a dataset such that the same variable is contained in difference columns for each subject. I want to merge them to ... DV_2 = c(3,3,5)) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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769 views

1 answer

dataframe - How to use cast or another function to create a binary table in R

I am trying to create a list of factors that have a binary response and have been using cast. DF2 <- cast(data.frame(DM), ... 1 2 0 1 0 3 1 0 0 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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987 views

1 answer

dataframe - What is the maximum size for a broadcast object in Spark?

When using Dataframe broadcast function or the SparkContext broadcast functions, what is the maximum object size that ... to all executors? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

543 views

1 answer

dataframe - Selecting columns in R data frame based on those *not* in a vector

I'm familiar with being able to extract columns from an R data frame (or matrix) like so: df.2 <- df[, c ... a better way than this last one? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

641 views

1 answer

dataframe - R: Split unbalanced list in data.frame column

Suppose you have a data frame with the following structure: df <- data.frame(a=c(1,2,3,4), b=c(" ... the required `rbind' takes even longer. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

728 views

1 answer

dataframe - Adding a column thats result of difference in consecutive rows in pandas

Lets say I have a dataframe like this A B 0 a b 1 c d 2 e f 3 g h 0,1,2,3 are times ... differently as in first element will become Nan. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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