https://github.com/nunorc/exopl

a minimalistic tool to illustrate the use of the Y-Space API in a C++ setting
https://github.com/nunorc/exopl

cpp exoplanets

Last synced: about 1 month ago
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a minimalistic tool to illustrate the use of the Y-Space API in a C++ setting

• Host: GitHub
• URL: https://github.com/nunorc/exopl
• Owner: nunorc
• Created: 2020-08-07T12:53:21.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-08-07T16:26:00.000Z (almost 5 years ago)
• Last Synced: 2025-04-09T21:54:45.766Z (about 1 month ago)
• Topics: cpp, exoplanets
• Language: C++
• Homepage:
• Size: 4.88 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        

# exopl

**A work in progress..**

A minimalistic tool to illustrate the use of the

[Y-Space](http://y-space.pw/) API in a C++ setting.

The `exopl` tool can be used to query the API and perform different

operations, specified using a command.

The goal is to build sequence of commands to perform more complex

operations, combined with some popular command line tools,

where the output of an operation is passed on as input to the

next using pipes.

To build the tool just clone the repository and:

    $ mkdir build ; cd build

	$ cmake ..

    $ make

[cmake](https://cmake.org/),

[libcurl](https://curl.haxx.se/libcurl/) and 

[jsoncpp](https://github.com/open-source-parsers/jsoncpp) are

required. The `exopl` binary should be available in the build

directory:

	$ ./exopl 

	Usage: exopl  [expr]

	Commands:

	 list	  list all exoplanets

	 filter	  filter exoplanets based on a given expreesion

	 select	  select parameters when exporting based on a given expression

	 as_txt	  print as text

	 as_csv	  print as CSV

For example to get a count of exoplanets by discovery method using a

combination of `exopl` and typical bash commands:

	$ exopl list | exopl select discoverymethod | exopl as_txt | grep -v '^$' | sort | uniq -c

	   1 discoverymethod: Astrometry

	   1 discoverymethod: Disk Kinematics

	  16 discoverymethod: Eclipse Timing Variations

	  50 discoverymethod: Imaging

	  96 discoverymethod: Microlensing

	   6 discoverymethod: Orbital Brightness Modulation

	   7 discoverymethod: Pulsar Timing

	   2 discoverymethod: Pulsation Timing Variations

	 810 discoverymethod: Radial Velocity

	3187 discoverymethod: Transit

	  21 discoverymethod: Transit Timing Variations

Or for example to get the count of exoplanets discovered by year with an orbital period

greater that 10 days:

	$ exopl list | exopl filter 'pl_orbper>10' | exopl select disc_year | exopl as_txt | grep -v '^$' | sort | uniq -c

	   1 disc_year: 1989

	   2 disc_year: 1992

	   1 disc_year: 1994

	   4 disc_year: 1996

	   1 disc_year: 1997

	   4 disc_year: 1998

	  11 disc_year: 1999

	  13 disc_year: 2000

	  11 disc_year: 2001

	  (...)

It is also useful to create CVS files that can later be imported in other programs.

For example to create a CSV file with a list of planets discovered after 2010 that contains

the planet name and the orbital period:

	$ exopl list | exopl filter 'disc_year>2000' | exopl select pl_name,pl_orbper | exopl as_csv > data.csv

	$ cat data.csv 

	11_com_b,11 Com b,326.02999999999997

	11_umi_b,11 UMi b,516.21996999999999

	14_and_b,14 And b,185.84

	14_her_b,14 Her b,1773.40002

	18_del_b,18 Del b,993.29999999999995

	(...)