gala | Galactic and gravitational dynamics in Python | Dataset library
kandi X-RAY | gala Summary
kandi X-RAY | gala Summary
Galactic and gravitational dynamics in Python
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- Plot the contours on a 2D grid
- R Returns the density of the star
- Validate time inputs
- Returns the c_valid_array
- Plot a 3D trajectory
- R Calculate the mass enclosed by mass
- Choose N_max
- Plot a 3D matrix
- Prepare plot for plotting
- Plot contours on a 2D grid
- R Compute the energy of the star
- Evaluate mean error functions
- Create a PhaseSpacePosition from a hdf5 file
- Setup Gala potential
- Create a potential from an equation
- Make an orbit
- Run the optimizer
- Calculate mass enclosed by q
- Run the integrator
- Plot the position
- Generate plots for plots
- Returns the maximum z of the orbit
- Return the pericenter of the orbit
- Compute the apocenter of the orbit
- Compute spherical harmonic coefficients
- Plot a time series of time series
- Save the object to an hdf5 file
gala Key Features
gala Examples and Code Snippets
Community Discussions
Trending Discussions on gala
QUESTION
I am working with a client that wants to provide an input spreadsheet with a text description of when certain events should occur in a given year. Each event (and there are at least 200 of them) is a separate row, containing a complex rule set about when it should occur, e.g., "the first Saturday before October 1st" or "the Friday closest to December 1st". There are also a few times when the event simply occurs on a particular date, but this is rare. However, the actual spreadsheet has about 15 columns that control the start dates of each event, so the logic I need to use to compute the start dates gets pretty in-depth.
I've come up with a way to compute the start dates using a function and a loop that iterates over each row of my data.frame, but I'm wondering whether there is a more efficient tidyverse or purrr solution to this problem. Is it possible (or advisable) to vectorize a solution to this problem?
This is my current (working) solution for the smallest, most compact example I could imagine. Can I make this more efficient, and readable for my more complex real-world input?
...ANSWER
Answered 2021-May-11 at 15:17If you would like to vectorize a function, under the hood it is really just making a call to mapply. So, if you want to use purrr style coding, you maybe just want to modify your function arguments as follows:
The setup:
QUESTION
public class three {
public static void main(String[] args) {
Apfel a = new Apfel();
}
}
class Apfel extends Frucht {
static Print mp = new Print("Boskop!");
Print mp2 = new Print("Gala!");
public Apfel() {
System.out.print("Jonagold!");
}
}
class Frucht extends Essbar {
Print mp2 = new Print("Banane!");
public Frucht() {
System.out.print("Kirsche!");
}
}
class Essbar {
static Print mp = new Print("Essbar!");
}
class Print {
public Print(String msg) {
System.out.print(msg);
}
}
ANSWER
Answered 2021-May-10 at 19:04Static variables are printed first because static variables are created on application startup, not when the code actually starts to run
Essbar!Boskop!
Inline initialized fields are initialized next, because constructors might want to use them.
Essbar!Boskop!Banane!Kirsche!
In-constructor initialisatons are printed last. Each construcor implicitly first calls super and then invokes its own code. Thata why "Gala!" is before "Jonagold!"
Essbar!Boskop!Banane!Kirsche!Gala!Jonagold!
So to conclude. First static variables are printed. Those are not related to your main method at all.
Then you create Apfel constructor. Before this runs Frucht constructor is called. As Frucht constructor might need Frucht.mp2, it is created and "Banane!" is printed. Fruchts own constructor finishes by printing "Kirche!". Now it's time for Apfel constructor. As it might needs Apfel.mp2 it is created and therefor "Gala!" is printed. Lastly the Apfel constructor finishes by printing "Jonagold".
As for why "Essbar!" is printed before "Boskop!". This all happens in the linking phase not running phase. Class Essbar needs to be visible to class Frucht because it extends it and Frucht needs to be visible to Apfel as it extends it. Class can not be visible to other classes before all it's static variables are initialised.
QUESTION
I am new to GOlang, I trying to filter slice of struct in GO using struct which contain some parameter for filter it. I am trying to do below things but its not work for me. In that code I have filter function which take slice of struct i.e GRN which need to filter using FilterParameter struct.
My Struct which need to filer
...ANSWER
Answered 2021-Apr-17 at 22:53You cant really do what youre trying to do, as its not possible to iterate the
fields of a struct (maybe with reflection). For another approach, you could
use maps instead of structs, or even easier, if you can just explicitly use
the fields you care about in the function parameters:
QUESTION
How would I search a list within a dictionary and then retrieve the key? The lists are values of a dictionary and I'm trying to find a specific item within those lists and then return the key.
For example:
...ANSWER
Answered 2021-Apr-14 at 20:24Just loop over the dictionnary:
QUESTION
I have several quite large data tables containing characters, which I would like to join with the entries in my database. The spelling is often not quite right, thus joining is not possible. I know there is no way around creating a synonym table to replace some misspelled characters. But is there a way to automatically detect certain anomalies (see example below)?
My data tables look similar to this:
...ANSWER
Answered 2021-Mar-25 at 15:00If I were you, I'd do a few things:
- I'd strip all special characters, lower case all characters, remove spaces, etc. That'd help a bunch (i.e. potato chips, Potato Chips, and Potato-chips all go to "potatochips" which you can then join on).
- There's a package called
fuzzyjointhat will let you join on regular expressions, by edit distance, etc. That'll help withApplevsApple Galaand misspellings, etc.
You can strip special characters (only keep letters) + lowercase with something like:
QUESTION
My maps match the schema. I'm clearly just not understanding something. I'm a newbie to appsync, graphql, and velocity so I'm sure it's a simple mistake, but I've been going in circles for hours trying to figure out what I'm doing wrong.
Query
...ANSWER
Answered 2021-Mar-01 at 04:07It began working when I changed the response template to the following:
QUESTION
I am having a hard time reading a XML file in to a List(Of Object) in vb.net Any help would be appreciated.
The problem occurs when the deserialization happens. I get the following error
System.InvalidOperationException: 'There is an error in XML document (2, 2).'
Inner Exception InvalidOperationException: was not expected.
XML
...ANSWER
Answered 2021-Feb-18 at 22:42I worked on the assumption that you cannot change any part of the Xml structure, and would prefer to change your own VB.Net code
I renamed your class CRecord to CD as it better represents what you are loading, and the XmlDeserialization process will match the Xml name to the Class name.
Also, I added the attribute to each of the properties as the Xml Element name is all upper case and the VB.Net property is not. You can choose not to add this attribute, but then you will need to change the property names to be all upper case to match the Xml.
The final bit of code needed was telling the XmlSerializer class what to use for the root node:
New XmlRootAttribute("CRecord")
QUESTION
I have an app settings portion in my app where the user can choose the font size of the app text size.
I thought I could use Properties.ContainsKey() in order to save the font size the user chose. Although this change is persistent upon the app close and restart, I would like these changes to happen instantly. For example, the user changes the font size mid app run, then when they click to go to a different tab or page the font size changes.
As of now I have saved the property in the App page and binder all the fonts I want to change in my app to the App property. The changes are persistent when I close and open my app but like I said when I change the font size I can roam throughout my app and the font remains the same. The only think that changes instantly is the labels I bonded with the slider where the user increases or decreases the font size.
App.xaml.cs public int H1Font
...ANSWER
Answered 2021-Jan-18 at 22:04I figured it out with the help of Junior Jiang. I had used INotifyPropertyChanged before but had never thought of using it here. That fixed half of the problem. The other half was getting the font inside my Listview to change, because I was binding a list to the itemSource already so although I thought my changes were not being implemented, they were. I ended up doing the following to get the solution.
QUESTION
I am new to xml and xslt . U have the following XML file
...ANSWER
Answered 2021-Jan-13 at 17:44artist is an element, not an attribute. And it is a child of cd, not of price. Therefore change your:
QUESTION
I have two data frames like these full of info about candidates for a job:
...ANSWER
Answered 2020-Dec-14 at 13:00You could first arrange the tibble by the score of interest, then generate dynamic sections using \section{} (LaTeX) in a loop.
Something along these lines would accomplish it, assuming kableExtra-tables is handled the same way as knitr::kable
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Install gala
You can use gala 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.
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