Recent questions tagged dataframe

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dataframe - Importing wikipedia tables in R

I regularly extract tables from Wikipedia. Excel's web import does not work properly for wikipedia, as it treats ... a user defined function? 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 - 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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dataframe - Sliding window in R

I have a dataframe DF, with two columns A and B shown below: A B 1 0 3 0 4 0 2 1 6 0 4 1 7 1 8 1 1 0 A ... 1 8 1 1 1 0 0.66 Any help 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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dataframe - Applying function (ks.test) between two data frames colum-wise in R

My simple question is: How do you do a ks.test between two data frames column by column? Eg. We have two data frames: D1 ... d2[, t])}, D1, D2) 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 - Print a data frame with columns aligned (as displayed in R)

I have the following data frame in R: > dframe Mean Median Candidates 85.68 60 NonCands 9.21 4 Multi 27. ... dframe<-data.frame(Mean,Median) 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 - Print a data frame with columns aligned (as displayed in R)

I have the following data frame in R: > dframe Mean Median Candidates 85.68 60 NonCands 9.21 4 Multi 27. ... dframe<-data.frame(Mean,Median) 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 extract unique elements from a data.frame in R?

Can someone suggest a way to extract unique elements from a data.frame? I have noticed unique, but since it works on ... ,"cat","dog","black") 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 - R - data frame - convert to sparse matrix

I have a data frame which is mostly zeros (sparse data frame?) something similar to name,factor_1,factor_2,factor_3 ABC,1 ... names = c(NA,-3L)) 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 - Drawing a Tangent to the Plot and Finding the X-Intercept using R

For a data frame whose 2 columns can draw a plot using plot(data$x,data$y) as shown below, how can we draw a tangent ... .names = c(NA, -226L)) 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 - Pyspark: Serialized task exceeds max allowed. Consider increasing spark.rpc.message.maxSize or using broadcast variables for large values

I'm doing calculations on a cluster and at the end when I ask summary statistics on my Spark dataframe with df. ... can I avoid this error ? 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 - paste several column values into one value in R

I have a really simple question that I cannot find a straightforward answer for. I have a data.frame that looks like ... I just don't know how! See Question&Answers more detail:os...

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

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380 views

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dataframe - Porting set operations from R's data frames to data tables: How to identify duplicated rows?

[Update 1: As Matthew Dowle noted, I'm using data.table version 1.6.7 on R-Forge, not CRAN. You won' ... post on running unique on data tables. 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 - Replace all NA with FALSE in selected columns in R

I have a question similar to this one, but my dataset is a bit bigger: 50 columns with 1 column as UID and ... processed, how can this be done? See Question&Answers more detail:os...

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

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522 views

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dataframe - R subsetting a data frame into multiple data frames based on multiple column values

I am trying to subset a data frame, where I get multiple data frames based on multiple column values. Here is ... better method to do 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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940 views

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dataframe - R: Adding NAs into Data Frame

I have a data frame like so: Name Position Value a 1 0.2 a 3 0.4 a 4 0.3 b 1 0.5 b 2 0.4 ... doing some sort of outer join with merge? 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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556 views

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dataframe - R dplyr subset with missing columns

I have the following code and would like to select columns into a new data.frame. library(dplyr) df = data.frame ... to solve this? Thank you. See Question&Answers more detail:os...

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

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618 views

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dataframe - R: Insert a vector as a row in data.frame

Can I insert a vector as a row in a data.frame? If so how? See Question&Answers more detail:os...

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

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955 views

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dataframe - How can I convert Ensembl ID to gene symbol in R?

I have a data.frame containing Ensembl IDs in one column; I would like to find corresponding gene symbols for the ... to add! 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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598 views

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dataframe - dply: order columns alphabetically in R

If I have a large DF (hundreds and hundreds) columns with different col_names randomly distributed alphabetically: df.x ... column(s)? 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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550 views

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dataframe - Replacing the missing values in pandas

I have a pandas dataframe where missing values are indicated as -999. In [58]: df.head() Out[58]: EventId ... be used to achieve this easily? See Question&Answers more detail:os...

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

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563 views

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dataframe - Total Mean & Mean by groups in R with dplyr

Assume I have a dataset something like df <- data.frame(dive=factor(sample(c("dive1","dive2"),10 ... different operations at different time See Question&Answers more detail:os...

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

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506 views

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dataframe - Data.frames in R: name autocompletion?

Sorry if this is trivial. I am seeing the following behaviour in R: > myDF <- data.frame(Score=5, ... seems that will never happen... 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 - R: Pivoting using 'spread' function

Continuing from my previous post, I am now having 1 more column of ID values that I need to use to pivot rows ... me know how I could do 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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635 views

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dataframe - In R data.frame, promote rownames to actual column

I have a data frame with one column and row names like this, > df freq hello 4 sorry 2 bad 9 good 4 great 1 I ... 3 bad 9 4 good 4 5 great 1 See Question&Answers more detail:os...

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

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785 views

1 answer

dataframe - R: Selecting first of n consecutive rows above a certain threshold value

I have a data frame with MRN, dates, and a test value. I need to select all the first rows per MRN ... greatly appreciated! Thank you very much! See Question&Answers more detail:os...

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

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671 views

1 answer

dataframe - Spark custom aggregation : collect_list+UDF vs UDAF

I often have the need to perform custom aggregations on dataframes in spark 2.1, and used these two ... awkward implemetation is justified? See Question&Answers more detail:os...

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

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664 views

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dataframe - Spark SQL UDF with complex input parameter

I'm trying to use UDF with input type Array of struct. I have the following structure of data this is ... Thank you for any help. See Question&Answers more detail:os...

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

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519 views

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dataframe - How to skip a paste() argument when its value is NA in R

I have a data frame with the columns city, state, and country. I want to create a string that concatenates: "City, ... including the sep = ", ". See Question&Answers more detail:os...

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

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