cosmology | Some code for calculating cosmological distances

by esheldon Python Version: Current License: No License

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kandi X-RAY | cosmology Summary

cosmology is a Python library. cosmology has no bugs, it has no vulnerabilities, it has build file available and it has low support. You can download it from GitHub.

A package to calculate cosmological distances. The workhorse is a class Cosmo that wraps and the underlying C code. The geometry can be non-flat. In order to take advantage of the speed of the underlying C code, you should, if at all possible, send numpy arrays to the methods rather than repeatedly call the python methods.

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Support

cosmology has a low active ecosystem.

It has 12 star(s) with 4 fork(s). There are 3 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 0 have been closed. On average issues are closed in 1108 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of cosmology is current.

Quality

cosmology has no bugs reported.

Security

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

License

cosmology does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

cosmology releases are not available. You will need to build from source code and install.

Build file is available. You can build the component from source.

Installation instructions are not available. Examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed cosmology and discovered the below as its top functions. This is intended to give you an instant insight into cosmology implemented functionality, and help decide if they suit your requirements.

Test the equation
Determine the density of the cosm
Calculate the distance from the cosm
Calculates the cosm of the cosm of zl and zs
Compute the density of the cosm
Calculate the cosm distance between two points
Calculate the ez of the covariance matrix
Calculates the density of the cosm function at z
Inverse of cosm_inv
Returns the velocity of the cosmo
Test Cosmo
Test for cosmo_inverse_purepy
Test for cosmo
Calculate the distance to the density function

Get all kandi verified functions for this library.

cosmology Key Features

No Key Features are available at this moment for cosmology.

cosmology Examples and Code Snippets

No Code Snippets are available at this moment for cosmology.

Community Discussions

Trending Discussions on cosmology

Pattern extract using Regex in Python

healpy anafast leads to large Cl's

why does it say "ValueError: The array returned by a function changed size between calls"?

Remove column matching 2 patterns with AWK

Chi-square testing for constraining a parameter

Precision of AstroPy distance redshift conversion

How to convert arcsec to Mpc using python astropy?

module has no attribute even though the module actually contains the script

How to calculate the of the age of the universe using astropy?

Chrome is stretching my images vertically, however everything works fine in Firefox/Edge

QUESTION

Pattern extract using Regex in Python

Asked 2021-Mar-31 at 22:38

I am trying to use regex for word extraction in python, since I am beginner and not experienced in regex I want you to help me, I have this String :

...

ANSWER

Answered 2021-Mar-31 at 22:38

You have to think about figuring out what connects your the elements you're trying to search for. Regular expressions rely on pattern recognition. Regular meaning

arranged in or constituting a constant or definite pattern, especially with the same space between individual instances.

recurring at uniform intervals.

Given this, your problem is not easily solvable because your source is not "Regular"

Namely, in one case you're looking for anything that ends with '- Theory;' However "anything" is overly broad. How do you differentiate between the match "Deadline for NSF-BSF programs in Elementary Particle Physics – Theory;" and the match you're looking for which is Elementary Particle Physics Your results don't conform to a uniform pattern, for example, Elementary Particle Physics is three words while Particle Astrophysics and Cosmology is 4 words.

Given the lack of constant or definite pattern I don't know that this is something that regular expressions really can help you with.

Certainly assuming that (1) ' in ' is the indicator that the words you're interested in are are starting, and that (2) all areas are separated by ';' and that (3) all areas end with - Theory or something in parenthesis, we can get the list you're looking for. However, these are the assumptions that must be consistent across all input sources if the below code is expected to work.

Source https://stackoverflow.com/questions/66895997

QUESTION

healpy anafast leads to large Cl's

Asked 2021-Feb-28 at 18:10

I'm using HEALPy's anafast to extract the Cl's from Planck maps, either the data map [1], or the simulation maps. It seems that even after I apply their Intensity common mask [2], I got a power spectrum that's about five times larger than their release [3].

...

ANSWER

Answered 2021-Feb-28 at 18:10

there are a couple of issues in your computation:

the binned power spectrum is already in D_ell, you shouldn't multiply it by ell(ell+1) factor, neither by T2
you have to divide by the sky fraction when you compute spectrum on cut sky

So this should work:

Source https://stackoverflow.com/questions/66407984

QUESTION

why does it say "ValueError: The array returned by a function changed size between calls"?

Asked 2020-Nov-06 at 15:07

I'm trying to calculate an integral and I don't understand the error output, what does it mean, what's the problem and how do I fix it? the output is "ValueError: The array returned by a function changed size between calls", I added the full output. pleas help, thank you

...

ANSWER

Answered 2020-Nov-06 at 15:07

I changed the variables of

optical_depth_fixed_source_integrand

so that they include the functions y_min and y_max instead of their vaviabes and now it works

Source https://stackoverflow.com/questions/64703856

QUESTION

Remove column matching 2 patterns with AWK

Asked 2019-Dec-24 at 05:07

Multiple lists of Books with ISBN,TITLE,OBSERVATION and other with OBSERVATION,TITLE,ISBN, I want remove column OBSERVATION, print TITLE as 1st column and ISBN as 2nd as follow.

Input:

123654 Cosmology Updated
35647 Medecine Revised
987456 Juriprudence Revised
Updated Rhetorics 123456
Revised epistomolgy 654321

Ouput desired:

Cosmolgy 123654
Medecine 35647
Rhetorics 123456
epistomolgy 654321

I tried this code found in SE and manipulated for hours without result

...

ANSWER

Answered 2019-Dec-24 at 02:26

EDIT: Since OP confirmed in comments that Input_file is NOT comma separated then by seeing OP's attempt, could you please try following then.

Source https://stackoverflow.com/questions/59462992

QUESTION

Chi-square testing for constraining a parameter

Asked 2019-Nov-18 at 11:52

I have an important question about the use of chi^2 test to constrain a parameter in cosmology. I appreciate your help. Please do not give this question negative rate (this question is important to me).

Assume we have a data file (data.txt) concluding 600 data and this data file has 3 columns, first column is redshift(z), second column is observational dL(m_obs) and third column is error(err). As we know chi^2 function is

...

ANSWER

Answered 2017-Aug-14 at 06:54

This is the correct answer:

Source https://stackoverflow.com/questions/45631732

QUESTION

Precision of AstroPy distance redshift conversion

Asked 2019-Aug-04 at 05:26

How accurate is the redshift conversion of AstroPy.coordinates.Distance function?

It appears to be useful only to the thousandths digit (much less precise than floating point number precision issues):

...

ANSWER

Answered 2019-Aug-04 at 05:26

This works in astropy 3.2.1 for python 3.7.

Source https://stackoverflow.com/questions/54935775

QUESTION

How to convert arcsec to Mpc using python astropy?

Asked 2019-May-28 at 14:03

I need to convert from arcsec to mega parsec scale for the following quantities:

...

ANSWER

Answered 2019-May-28 at 14:03

To find the distance, you need to multiply angular diameter distance by angular size.

l = D_A(z) × θ

Reference: http://arcsec2parsec.joseonorbe.com/about.html

Source https://stackoverflow.com/questions/56279723

QUESTION

module has no attribute even though the module actually contains the script

Asked 2019-May-22 at 07:25

Here is the layout of the simulations I am running

...

ANSWER

Answered 2019-May-22 at 07:25

Edit: I changed my answer after better understanding the problem.

Your problem comes from circular imports (see this tutorial for instance): your files settings_centroid.py and gizmo_read/read.py both include each other.

When you import settings_centroid.py, it imports reads.py that directly runs settings_centroid.init(), but at that point, Python didn't load all the symbols that are within settings_centroid.py, hence it doesn't find init().

Circular imports bring tricky problems to solve. My advice would be to refactor your code to avoid them, which could take a bit of time if your codebase is already big.

One option, that may not make sense with the logic of your whole code, (if it doesn't, sorry you'll have to think this through) if settings_centroid.py is something of a helper class, is to make a sub-package with it and try to limit its dependency on other modules.

If you really can't refactor, you can try to limit your imports to function scopes. For instance, settings_centroid.py could become

Source https://stackoverflow.com/questions/56138006

QUESTION

How to calculate the of the age of the universe using astropy?

Asked 2019-Feb-20 at 20:07

I want to convert the value of Hubble constant H0 into Gyr unit and also want to calculate the age of the universe, t0, by python. The code that I have used is shown below. The conversion of H0 looks fine but the value of t0 should appear 13.78 but it shows 0.013. But if I perform the calculation of t0 analytically then I easily find 13.7. Why it is happening? Expecting your help.

...

ANSWER

Answered 2018-Dec-05 at 17:23

The following gives the naive age of the Universe (ignoring acceleration):

Source https://stackoverflow.com/questions/53625839

QUESTION

Chrome is stretching my images vertically, however everything works fine in Firefox/Edge

Asked 2018-Dec-18 at 22:04

Hi guys so I'm having this problem where images at the bottom of my website are being stretched vertically in chrome between @media only screen and (min-width: 401px) and (max-width: 960px)

I believe it has something to do with the .bottomsection css style rules. Since when I remove them the images are scaled normally, however my .sign-up div no longer scales to the same height as my Karl Marx photo.

My layout does appear to be working in Firefox/edge i just cant get the layout to work in chrome. Any help would be greatly appreciated, thanks in advance.

Here is the website https://web.gccaz.edu/~dor2174998/CIS233DA/famous/alanWattsOLD.html

...

ANSWER

Answered 2018-Dec-18 at 21:20

It appears that Chrome doesn't understand height:auto; on the img in this case. This can be fixed using:

@ stylesOLD.css | Line: 316

Source https://stackoverflow.com/questions/53839179

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install cosmology

You can download it from GitHub.
You can use cosmology like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

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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