5.4.3 Can you answer these questions?

5.4.3.1 Does Mathematica 11 have spherical coordinate unit vectors?

https://mathematica.stackexchange.com/landing/r/newsletter?cta=question&id=165603

I have a spherical vector wave for an electric field: 
 
e[r_, \[Theta]_, \[Phi]_, t_] := (Sin[\[Theta]]/r) [ 
Cos[r - t] - Sin[r - t]/r] 
 
 
which points in the phi direction. In mathematics, I would  ... 
[vector] [vector-calculus] [coordinate-transformation]
 

asked by Michael B. Heaney https://mathematica.stackexchange.com/landing/r/newsletter?cta=user&id=37599 1 vote

answered by Bill Watts https://mathematica.stackexchange.com/landing/r/newsletter?cta=user&id=53121 0 votes

5.4.3.2 Communicating with server over Websocket using SocketConnect

https://mathematica.stackexchange.com/landing/r/newsletter?cta=question&id=165382

I am trying to connect to a web socket feed of Gdax. The documentation is here,https://docs.gdax.com/#websocket-feed. There is no account needed and the information is public.  I have successfully  ... 
[streams] [webservices] [networking] [socket]
 

asked by Ray Troy https://mathematica.stackexchange.com/landing/r/newsletter?cta=user&id=23180 2 votes

5.4.3.3 Assign a unit to a variable in a function

https://mathematica.stackexchange.com/landing/r/newsletter?cta=question&id=165596

I have the following input: 
 
PVW[V_, T_] := (R*T/(V - b)) - (a/(V^2)) 
 
 
Where I have already defined R as the molecular gas constant with its corresponding units and a and b are constants with their  ... 
[function-construction] [units]
 

asked by BobaJ https://mathematica.stackexchange.com/landing/r/newsletter?cta=user&id=55203 1 vote

answered by m_goldberg https://mathematica.stackexchange.com/landing/r/newsletter?cta=user&id=3066 0 votes