2.10 Thursday, October 15, 2020

2.10.1 Top new questions this week

How can I plot my financial indicator below a trading chart (produced by TradingChart) with the same x-axis?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=231660

Since this question was not answered, I would like to ask again with some additional information. I have a trading chart saved as chart1 as follows.

asked by DLT https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=54107 9 votes

answered by Lukas Lang https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36508 6 votes

Adding elements of second list in succession

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=231695 Given

t1 = {{1, 2}, {3, 4}}; 
t2 = {{a, b, c}, {e, f}};

I want to add in succession elements of list 2 to list 1 to get:

asked by user57467 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=57467 7 votes

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 8 votes

Has the Undo command really been settled? On version 12.1 it only works sporadically. What are some reasons it drops steps?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=231523

Although Undo has been around since version 10 (before my time) I’ve noticed that sometimes it works just fine up to the moment of the last ...

asked by Jules Manson https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=37721 7 votes

Solving heat equation on a cylinder with insulated ends and convective boundary conditions

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=231588

I am trying to solve heat equation on a cylinder whose ends are thermally insulated and its circular face is exposed to convection. Therefore I have Neumann boundary condition on all faces of the ...

asked by Deep https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=44615 7 votes

answered by yawnoc https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72028 5 votes

Converting a RawBoxes object to a workable expression

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=232789

I have manged to turn an image into a RawBoxes expression. How do I turn in back into something I can use in Graphics In ...

asked by Hugh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12558 6 votes

answered by Carl Woll https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=45431 9 votes

Mean age of people

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=232809

I have the following datas:

I want to find mean age by using following formula,

Any way to do this in general in Mathematica easily.

asked by Jasmine https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=73364 6 votes

answered by xzczd https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1871 12 votes

Suggestion bar still causing Kernel crashes?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=232784

On Mathematica 12.1.1, Windows 10. When Suggestions bar is active, entering and evaluating the following crashes the Kernel.

asked by ciao https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=11467 6 votes

2.10.2 Greatest hits from previous weeks

How to express trigonometric equation in terms of of given trigonometric function?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=434

How can I express a trigonometric equation / identity in terms of a given trigonometric function?

using following trigonometric identities

asked by Prashant Bhate https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=99 30 votes

answered by Simon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=34 37 votes

Elegant operations on matrix rows and columns

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=3069

Question

The Mathematica tutorial has a section ’Basic Matrix Operations’, describing operations like transpose, inverse and determinant. These operations all work on entire matrices. I am missing a ...

asked by sjdh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=515 180 votes

answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 60 votes

What do the X and Y axis stand for in the Fourier transform domain?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=85139

In Wolfram Mathematica the function Fourier has the following declaration

Fourier[list]

And after a list is given to the ...

asked by user253956 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=29958 27 votes

answered by Hugh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12558 61 votes

Figuring when the minute and hour hand coincide on a clock

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=573

I would like to list all possible times in a 12-hour period, where the hour hand overlaps the minute hand completely. This is really a question about three distinct things - to be done in Mathematica ...

asked by Steve D https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=191 15 votes

answered by Verbeia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8 21 votes

Code that generates a mandala

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=136974

My little brother asked me to print original mandalas for coloring. I would like some idea on how to create them, but without color, so he can color them.

examples

asked by zeros https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=26849 72 votes

answered by Anton Antonov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=34008 95 votes

How to generate a random snowflake

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=39361

’Tis the season...

And it’s about time I posed my first question on Mathematica Stack Exchange. So, here’s an holiday quest for you Graphics (and P-Chem?) gurus.

What is your best code for generating ...

asked by Peltio https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=6745 140 votes

answered by Silvia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=17 181 votes

Extract real part of a complex expression better than Re does

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=3306

I have a complex expression with real positive variables only.

Mathematica Input Style:

asked by max https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=796 33 votes

answered by nixeagle https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=814 52 votes

2.10.3 Can you answer these questions?

Passing input from a textfile into a function

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=231540

I have a text file which is a list of numbers and would like to pass each number in the list as input to a Mathematica function. For example, my text might contain [2, 1, 4], and I would like to pass ...

asked by Joshua Steier https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=75099 1 vote

How to get the coefficients of second-order Runge-Kutta formula coherently?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=231528

The form of the second order Runge Kutta formula is as follows(the following is from page 287 of this book):

asked by A little mouse on the pampas https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=42417 1 vote

Taking "intermediate" limits, e.g. \({\cal X}\to 0\) but \({\cal X}/\epsilon \to \infty \) as \(\epsilon \to 0\) - *without* taking \(\epsilon \to 0\) directly

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=232859 I have an expression that I would like to take limits of but not in a conventional sense. Take for example, an expression like

This expression involves intermediate variables

asked by epsilonD3LT4 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=75082 1 vote