CEM | Computational ElectroMagnetism on a Yee Lattice
kandi X-RAY | CEM Summary
kandi X-RAY | CEM Summary
🚀 Computational ElectroMagnetism on a Yee Lattice
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- Compute the curl
- Ddy of A
- Computes the derivative of the derivative of A
- Shift a matrix
- Perform periodic boundary conditions
- Calculate periodic BC basis
- Update the track
- Integrate velocity and velocity
- Compute the laplacian matrix
- 2ndx2nd matrix
- Integrates the velocity of an orbit
- Divides E
- Plot a cyl2D
- Plots a 2D contour
- Implements plot
- Plot energy conservation
- Plot the maximum field
- Plot 2D surface
- Resolve residuals
- Plot the track
- Calculate the divider
CEM Key Features
CEM Examples and Code Snippets
Community Discussions
Trending Discussions on CEM
QUESTION
so, I'm making this simple game in python 3.7.7 with pygame and I'm trying to make a "random" movement for the enemies. But when I run the program with the enemies movement, my player moves a bit jerky (I hope I'm using the verb as it's intended). I cannot find what is making me move so weird. I have tried 2 diferent aproaches for the enemy movement and in both the problem is the same.
1st Try:
...ANSWER
Answered 2021-May-08 at 09:04Remove the multiple calls to screenupdt from your code. It is sufficient to draw the scene and update the display once per frame. Remove it from the enem.move method and the application loop. Call it once at the end of the application loop:
QUESTION
I am trying to find the Exact Match in my dataset using the CEM library in R. Here is my dataset given. https://docs.google.com/spreadsheets/d/1y_ZN_FW163R6ZpYRuDyOtUbKtSakgr-IBhpg-rZQQC8/edit?usp=sharing
I am using the following code but I am getting an error while running CEM function to find out the exact match.
...ANSWER
Answered 2021-Mar-16 at 16:52The problem is that there is almost no data at high levels of SOFA.score. Here's the table of SOFA.score by TXA.
QUESTION
I'm trying to use and convert following code in a Pine screener
...ANSWER
Answered 2021-Feb-04 at 09:07All calculations that are necessary for the function screenerFunc must be included in this function. Also, if you use the history access operator [1], you must first declare the variable. The errors in the script below are fixed, but you should check for yourself whether the script creates the labels correctly.
QUESTION
I am trying to implement a one to one coarsened exact matching. I am following the help package available here: https://cran.r-project.org/web/packages/cem/cem.pdf
For now, I am trying to implement the example on pg 3 on the lalonde dataset from the package Matching. My code is as follows:
...ANSWER
Answered 2021-Jan-27 at 17:57This cannot be done with cem. It doesn't actually create matched pairs; within each stratum defined by the coarsened covariates, it ensures the number of treated and control units within each stratum is the same. The strata can be exported and you can attempt to find which units belong to which strata.
The implementation of coarsened exact matching in the MatchIt package does have this capability. Below is how you would perform the matching using MatchIt:
QUESTION
i hope someone can help me. So bascically the function has a trigger based on a google forms application. In the Forms i got a Dropdown Menu with 5 Names. These Names get always get put in Row 1 of the Google Sheet. Now the Script creates a Doc with the Data from the Sheet and puts it in a specific Folder (const destinantionFolder) - My Goal now is to change the destinationFolder based on the Name that is selcted from the Dropdown - so i got 5 different text variations in the Sheets Cell (The 5 Names) that should lead to 5 different destinationFolders. How do i define that? Huge thanks for helping me!
this is the code rightnow (i got it from a YT Video from Jeff Everhart):
...ANSWER
Answered 2021-Jan-15 at 20:23You can simply create a key-value pair in javascript which will define your folder id per user. You just need to use the name of the user as a key to get its corresponding folder id.
Example Implementation:
QUESTION
I have a dataframe which looks like this:
...ANSWER
Answered 2020-Nov-17 at 01:27Depending on what effects you are interested in and how you will fit the model, you will end up with different number of effects. For example, in the case whereby you fit the main and interaction effects, you should end up with 8 columns for the interactions ie (a-1) x (b-1). In the case you do not fit the main effects you end up with a*b - 1:
Here is how to create your matrix:
With main effects:QUESTION
I've searched a lot and couldn't find an answer. I am working in R. I have a dataframe with two types of columns - numeric columns and charcater columns. I am trying to calculate descriptive statistics for the numeric variable columns, according to grouping variables from the character columns (I do this with the describeBy function from the psych library, works fine outsdie of the loops). In addition, I would like to run the same analysis on a subset of the rows from the original dataframe, so I created another subsetted dataframe. So, I have two dataframes, each with three character columns and four numeric columns. The dataframes looks like this:
...ANSWER
Answered 2020-Oct-14 at 09:57You can store the output of describeBy function in a list and you are right the issue is with how you access the column names. You cannot use $ to access column names when they are character values use double brackets ([[]]).
QUESTION
Here, in the only answer, it's a simple arrow: How to present an abstract class in UML class diagram
But here, it's similar to the interface arrow: http://www.cems.uwe.ac.uk/~jsa/UMLJavaShortCourse09/CGOutput/Unit9/unit9(0809)/page_03.htm
I'm thinking it should be the same arrow as class to interface arrow of the diagram; is that right?
...ANSWER
Answered 2020-Oct-06 at 23:44No. The picture you reference shows a generalization. In that case the three concrete classes below just inherit from the abstract class on top. The isAbstract property of the top class just tells that you can not instantiate it directly. You must derive concrete classes (which inherit attributes/operations).
The assocation in the referenced answer just tells that the concrete class Structure deals with concrete classes derived from Contexte. You see three generalizations to the right which for sure will be those concrete classes.
N.B. Inheriting from an abstract class is "similar" to realizing an interface.
QUESTION
I want to update my table with 'Update' if one of the row with the same ID_AWB have 'Update'. Below is the current table looks like.
...ANSWER
Answered 2020-Sep-30 at 05:09I would use exists logic here:
QUESTION
I have a Custom Tag Generator system for XML. I am using custom PHP. Here I am able to add custom XML tags and add its functionality. What I want to achieve is that I would like to show display contents from a specific tag only. Check out the following code if mine:
...ANSWER
Answered 2020-Sep-04 at 14:09PHP has several builtin XML libraries. For this use case I would opt for SimpleXML:
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Clone the github repocheshirepezz/CEM
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