================================== Top new questions this week: ==================================
[How to design CloudObjects with reasonable CloudCredit costs] http://mathematica.stackexchange.com/questions/109259/how-to-design-cloudobjects-with-reasonable-cloudcredit-costs
Note: I originally thought to post this as a non-answer/extended comment to this question; however I feared that I would end up hijacking the original question. It is likely a duplicate with the ...
- asked by bobthechemist (17 votes)
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[How to merge two screenshots into one image?] http://mathematica.stackexchange.com/questions/109196/how-to-merge-two-screenshots-into-one-image
I have two screenshots:
For a long screenshot picture I usually use PhotoShop to combine both images:
How do I use Mathematica to make an automated program to do this? This is my current ...
- asked by yode (13 votes), answered by Arnoud Buzing (13 votes)
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[Current (e.g., ca. 2016 / MMa 10 / WP 4+) best practices for embedding interactive content in WordPress?] http://mathematica.stackexchange.com/questions/109231/current-e-g-ca-2016-mma-10-wp-4-best-practices-for-embedding-interacti
My strategy, in the past, has been to embed interactive CDF files into my WordPress blog for student’s to use (Much like the Wolfram Demonstration Project).
As many know 1) the ’Plug in’ ...
- asked by flip (11 votes)
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[Getting data from FRED] http://mathematica.stackexchange.com/questions/109203/getting-data-from-fred
Mathematica V10.4 supports a service for connection to FRED. If you create a connection with
fred = ServiceConnect["FederalReserveEconomicData"]
(you need to have created a login id to be ...
- asked by George Wolfe (11 votes), answered by George Wolfe (4 votes)
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[Do[ ]s and Don’t[ ]s when teaching Mathematica in undergraduate courses] http://mathematica.stackexchange.com/questions/108987/do-s-and-dont-s-when-teaching-mathematica-in-undergraduate-courses
Question motivated by some horrific homework-related posts that I don’t dare to link:
What are the top Do’s and Dont’s when teaching Mathematica to undergrads?
I don’t ask for the design of a ...
- asked by Dr. belisarius (11 votes), answered by bobthechemist (10 votes)
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[Primes Race (Mathematica Efficiency)] http://mathematica.stackexchange.com/questions/108798/primes-race-mathematica-efficiency
I am currently working with a paper that deals with this concept of Prime Races. You essentially create a large list of prime numbers and then split that list into two teams. You are assigned to ...
- asked by Dops (10 votes), answered by bbgodfrey (6 votes)
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[Gathering of list] http://mathematica.stackexchange.com/questions/109104/gathering-of-list
Problem statement
The following challenge was recently posted to the J language programming forum by Skip Cave http://jsoftware.com/pipermail/programming/2016-March/044561.html
"The animal ...
- asked by murray (9 votes), answered by J. M. (13 votes)
================================== Greatest hits from previous weeks: ==================================
[Find eigen energies of time-independent Schrodinger equation] http://mathematica.stackexchange.com/questions/32293/find-eigen-energies-of-time-independent-schr%c3%b6dinger-equation
I’m trying to get the eigenvalues of a one dimensional time-independent Schrodinger equation,
\(-\frac {h^2}{2m_0}\frac {d^2\psi }{dx^2}+U(x)~\psi =Ei~\psi \)
where U(x) is some potential and Ei is the ...
- asked by xslittlegrass (35 votes), answered by Jens (38 votes)
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[How to plot an ellipse?] http://mathematica.stackexchange.com/questions/20100/how-to-plot-an-ellipse
I’m new to Mathematica, and I’m finding it difficult to plot an ellipse. I tried using
Plot[(x/5)^2 + (y/3)^2 == 1, {x, -5, 5}, {y, -3, 3}]
but I’m getting some errors. Is there something wrong ...
- asked by Sriram (4 votes), answered by Jens (12 votes)
================================== Can you answer these? ==================================
[Mimicking Console and Output Matlab/Rstudio-Style Environment in Mathematica?] http://mathematica.stackexchange.com/questions/109179/mimicking-console-and-output-matlab-rstudio-style-environment-in-mathematica
I am trying to crudely approximate the RStudio or Matlab Workspace environment in Mathematica by having a specific notebook function as the "console notebook" where I execute commands and another ...
- asked by user13999 (6 votes)
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[What is the equivalent of $ModuleNumber for DynamicModule] http://mathematica.stackexchange.com/questions/108850/what-is-the-equivalent-of-modulenumber-for-dynamicmodule
Mathematica provides access to $ModuleNumber which can be enormously useful.
Unfortunately I can’t find the equivalent for DynamicModule.
I know such a parameter must exist for two reasons:
First, ...
- asked by MB1965 (8 votes)
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[Why this expression is not evaluated correctly?] http://mathematica.stackexchange.com/questions/109310/why-this-expression-is-not-evaluated-correctly
Look at the following code:
f[kx_, ky_] := -1*(Exp[I*kx] + 2*Exp[-I*kx/2]*Cos[Sqrt[3]*ky/2]); H = {{1, f[kx, ky]}, {Conjugate[f[kx, ky]], -1}}; D[Norm[Normalize[Eigensystem[H][[2]][[1]]]], kx] /. {kx ...
- asked by Chong Wang (1 vote)