ellen | linear genetic programming system for symbolic regression

by lacava C++ Version: v1.2.0 License: GPL-2.0

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | ellen Summary

ellen is a C++ library. ellen has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

ellenGP uses a stack-based, syntax-free, linear genome for constructing candidate equations. It is built to include different evolutionary methods for system identification adapted from literature. The options include normal tournament selection, deterministic crowding, and age-pareto fitness selection. All algorithm choices are mangaged by one parameter file.

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Support

ellen has a low active ecosystem.

It has 24 star(s) with 8 fork(s). There are 6 watchers for this library.

It had no major release in the last 12 months.

There are 1 open issues and 2 have been closed. On average issues are closed in 26 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of ellen is v1.2.0

Quality

ellen has no bugs reported.

Security

ellen has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

ellen is licensed under the GPL-2.0 License. This license is Strong Copyleft.

Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

Reuse

ellen releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

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ellen Key Features

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ellen Examples and Code Snippets

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Community Discussions

Trending Discussions on ellen

Combine values from duplicated rows into one based on condition (in R)

Detecting records with different number of columns in a CSV

How do i filter nested json file using python?

Recursion for a classification tree problem in r for an s3 class

SELECT last row, but only if column value is the expected one

I want to get the inner entries from a MongoDB data but the outer entries sticks with the data I need

Reorder values on x axis ggplot2

check multiple tsv file and drop all the same rows from each tsv in python

How to find a second specific word after a first specific word in a dataframe

How to request JSON among three tables

QUESTION

Combine values from duplicated rows into one based on condition (in R)

Asked 2021-Jun-15 at 16:51

I have a dataset with the name of Danish ministers and their position from 1990 to 2020 (data comes from dataset called WhoGovern; https://politicscentre.nuffield.ox.ac.uk/whogov-dataset/). The dataset consists of the ministers name, the ministers position, the prestige of that position, and the year in which the minister had that given position.

My problem is that some ministers are counted twice in the same year (i.e., the rows aren't unique in terms of name and year). See the example in the picture below, where "Bertel Haarder" was both Minister of Health and Minister of Interior Affairs in 2010 and 2021.

I want to create a dataset, where all the rows are unique combinations of name and year. However, I do not want to remove any information from the dataset. Instead, I want to use the information in the prestige column to combine the duplicated rows into one. The observations with the highest prestige should be the main observations, where the other information should be added in a new column, e.g., position2 and prestige2. In the example with Bertel Haarder the data should look like this:

(PS: Sorry for bad presenting of the tables, but didn't know how to create a nice looking table...)

Here's the dataset for creating a reproducible example with observations from 2010-2020:

...

ANSWER

Answered 2021-Jun-08 at 14:04

Reshape the data to wide format twice, once for position and the other for prestige_1, and join the two results.

Source https://stackoverflow.com/questions/67888166

QUESTION

Detecting records with different number of columns in a CSV

Asked 2021-May-31 at 10:08

I need to daily ingest a CSV file into a pandas dataframe. The CSV has several thousand rows but every day I get a few records with more columns than expected. Let me give you an example. Take the following CSV:

...

ANSWER

Answered 2021-Apr-30 at 14:19

If you are okay with processing the bad records later, you can use error_bad_lines and warn_bad_lines while reading the csv file and save the row number of skipped records to a log file like this:

Source https://stackoverflow.com/questions/67333980

QUESTION

How do i filter nested json file using python?

Asked 2021-May-24 at 19:06

I'm trying to filter a nested JSON file. I want to create a new json file with fitering "classes" and "id". The source JSON file :

...

ANSWER

Answered 2021-May-24 at 18:53

As the loaded json data is just nested lists and dicts, you can use the ordinary list/dict operations; in particular, list comprehension is useful.

Source https://stackoverflow.com/questions/67677366

QUESTION

Recursion for a classification tree problem in r for an s3 class

Asked 2021-May-23 at 08:30

I am writing a class (s3) that should use a constructor to create an instance for the class, at least for a start. The constructor junction(name, left, right). Where name is the description of a node in a classification tree.

So I have a class called junction having 3 entries as indicated above.

...

ANSWER

Answered 2021-May-23 at 08:30

If you change your consturctor to something like

Source https://stackoverflow.com/questions/67657573

QUESTION

SELECT last row, but only if column value is the expected one

Asked 2021-May-11 at 01:09

My Table

...

ANSWER

Answered 2021-May-11 at 01:09

Well, one method is to use order by and limit the results to one row:

Source https://stackoverflow.com/questions/67479330

QUESTION

I want to get the inner entries from a MongoDB data but the outer entries sticks with the data I need

Asked 2021-Apr-21 at 04:31

I have a MongoDB data that looks like this:

...

ANSWER

Answered 2021-Apr-21 at 03:44

give this pipeline a shot. if that's not the expected result, let me know the exact shape of the output you need.

Source https://stackoverflow.com/questions/67188663

QUESTION

Reorder values on x axis ggplot2

Asked 2021-Apr-16 at 18:03

I have a small dataset that looks like this:

...

ANSWER

Answered 2021-Apr-16 at 18:03

mydata$Value2 <- ave(mydata$Value, mydata$Name, FUN = sum)
with(subset(mydata, Sex == "M"), Name[order(-Value2, -Value, Name)])
# [1] "Mark"  "Luisa" "Randy" "Ellen" "Al"   
mydata$Name <- factor(mydata$Name, levels = with(subset(mydata, Sex == "M"), Name[order(-Value2, -Value, Name)]))
str(mydata)
# 'data.frame': 10 obs. of  4 variables:
#  $ Name  : Factor w/ 5 levels "Mark","Luisa",..: 5 5 4 4 2 2 1 1 3 3
#  $ Sex   : chr  "M" "F" "M" "F" ...
#  $ Value : num  0 1 2 3 6 4 7 3 5 1
#  $ Value2: num  1 1 5 5 10 10 10 10 6 6

Source https://stackoverflow.com/questions/67130001

QUESTION

check multiple tsv file and drop all the same rows from each tsv in python

Asked 2021-Mar-11 at 09:56

i have three tsv files.

file 1:

...

ANSWER

Answered 2021-Mar-11 at 09:56

You first need to read all your TSV files and count each occurrence of the first two columns. Python's Counter() can be used for this (which is based on a dictionary).

Whilst reading each row in, save it in a data dictionary where the keys are the filenames and the contents are lists of the first two values along with the raw rows. A defaultdict() is used to avoid having to add an entry if it doesn't already exist before appending a new entry.

After reading everything in, counts can now be used to determine if any given row has been seen only once, other values can be skipped over.

Source https://stackoverflow.com/questions/66544388

QUESTION

How to find a second specific word after a first specific word in a dataframe

Asked 2021-Mar-10 at 03:55

I've looked at similar cases but they are not the same.

I've got a pandas frame. Each row is a study. In a particular column, I need to find out how many times a specific word, i.e. bed, comes after another specific word, i.e. home.

I need to find out how many cases in the pandas frame this situation happens.

I've seen questions that ask about extracting whatever text comes after a specific word but not a case like this. I'm assuming this might be regex but can't figure out how to do it.

My code to create a sample dataframe.

...

ANSWER

Answered 2021-Mar-07 at 02:32

To find the number of times that "bed" appears after "home" in the whereabouts column, use the following code.

The function second_after returns True if the input text contains the second word after the first word (rfind finds the last second word). This can be applied to the whereabouts column of the dataframe, generating a new column results for easy cross-checking.

Finally, the method .sum is applied to the results column, counting all the True values ("like 1") and not False values ("like 0"):

Source https://stackoverflow.com/questions/66511957

QUESTION

How to request JSON among three tables

Asked 2021-Mar-08 at 09:26

Suppose I have 3 tables employee, child and employee_child.

The first table contains id and name columns, the second contains id and name as well, and in the last contains id, employee_id, child_id.

Those tables (employee and child) are associated in the table employee_child.

To help, I let these queries to populate those tables:

...

ANSWER

Answered 2021-Mar-08 at 09:26

FOR JSON AUTO seems to get you exactly what you want:

Source https://stackoverflow.com/questions/66520448

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Vulnerabilities

No vulnerabilities reported

Install ellen

I’ve built the project in Visual Studio 2010 professional as well as C Express (which is free from Microsoft), and in linux with g and the intel c++ compiler using the make files. If you use VS 2010 Express, the OpenMP files (which were removed from VS 2010) need to be added to the VS path.
[boost libraries](http://www.boost.org) - a set of multi-purpose c++ libraries, needed for RunTrialsMPI only
[eigen](http://eigen.tuxfamily.org/index.php?title=Main_Page) - a c++ template library for linear algebra

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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