daru | Data Analysis in RUby
kandi X-RAY | daru Summary
kandi X-RAY | daru Summary
daru (Data Analysis in RUby) is a library for storage, analysis, manipulation and visualization of data in Ruby. daru makes it easy and intuitive to process data predominantly through 2 data structures: Daru::DataFrame and Daru::Vector. Written in pure Ruby works with all ruby implementations. Tested with MRI 2.5.1 and 2.7.1.
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Top functions reviewed by kandi - BETA
- Initializes categories .
- Creates a matrix with the given values .
- recode an array
- Sorts the categories .
- Sorts the vector according to this vector .
- Aggregates values into vectors
- Retrieve a slice or a slice of the index .
- Set vectors at positions
- Retrieve vectors by positions
- Create a numeric array of categories .
daru Key Features
daru Examples and Code Snippets
Community Discussions
Trending Discussions on daru
QUESTION
One can drop the first n elements of an array by using Array#drop.
ANSWER
Answered 2018-Nov-27 at 10:26You can use row_at to retrieve all the rows without the first 4.
Example:
QUESTION
I want to get grouped aggregated data, but running into a problem with the aggregating same column with multiple functions.
Basically, I want to know if there is a way to rename an aggregated column, so it doesn't rewrite.
Here is my code
...ANSWER
Answered 2019-Nov-25 at 14:32Well, I finally found the answer here.
Agreggation of grouped data can be done like this:
QUESTION
Is it possible to create a Daru DataFrame from a CSV in which the first column is a series of dates?
Take the following CSV, for instance:
...ANSWER
Answered 2019-Apr-26 at 06:20df = Daru::DataFrame.from_csv("df.csv")
df.set_index "time"
df.index = Daru::DateTimeIndex.new(df.index)
df
QUESTION
I have an array of items like so: [DateTime, value]. I want to group the items which satisfy the following conditions:
- A sequence of 3 or more items
- Items contain values which are > 0
- times are sequential (increasing by 1 second)
I want to get the indices of the start and end of the sequences that meet those conditions.
E.g.
...ANSWER
Answered 2018-Nov-06 at 10:41t = Time.now
a = [
[t + 0, 1],
[t + 1, 1],
[t + 2, 1],
[t + 3, 0],
[t + 4, 1],
[t + 5, 1],
[t + 16, 1],
[t + 17, 1],
]
a
.each_with_index
.chunk_while{
|(x, i), (y, j)|
x[1].positive? and
y[1].positive? and
x[0].to_i.next == y[0].to_i
}
.select{|chunk| chunk.length >= 3}
.map{|chunk| [chunk.first[1], chunk.last[1]]}
# => [[0, 2]]
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install daru
On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.
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