Top "Data-manipulation" questions

Data manipulation is the process of altering data from a less useful state to a more useful state.

How can I access and process nested objects, arrays or JSON?

I have a nested data structure containing objects and arrays. How can I extract the information, i.e. access a …

javascript arrays object nested data-manipulation
How do I remove objects from an array in Java?

Given an array of n Objects, let's say it is an array of strings, and it has the following values: …

java arrays data-structures data-manipulation
Converting String Array to an Integer Array

so basically user enters a sequence from an scanner input. 12, 3, 4, etc. It can be of any length long and it …

java string integer user-input data-manipulation
Removing elements with Array.map in JavaScript

I would like to filter an array of items by using the map() function. Here is a code snippet: var …

javascript functional-programming data-manipulation client-side
Split delimited strings in a column and insert as new rows

I have a data frame as follow: +-----+-------+ | V1 | V2 | +-----+-------+ | 1 | a,b,c | | 2 | a,c | | 3 | b,d | | 4 | …

r dataframe reshape data-manipulation strsplit
remove row with nan value

let's say, for example, i have this data: data <- c(1,2,3,4,5,6,NaN,5,9,NaN,23,9) attr(data,"dim") <- c(6,2) …

r nan data-manipulation
Read a CSV from github into R

I am trying to read a CSV from github into R: latent.growth.data <- read.csv("https://github.…

r data-manipulation data-management
Check python string format?

I have a bunch of strings but I only want to keep the ones with this format: x/x/xxxx …

python string data-manipulation
Subsetting a matrix by row.names

I have a matrix with the following row.names: "X1" "X5" "X33" "X37" "X52" "X566" Now I want to select …

r data-manipulation
Dropping Multiple Columns from a data frame using Python

I know how to drop columns from a data frame using Python. But for my problem the data set is …

python pandas dataframe data-manipulation