1.13 Thursday, February 11, 2021

1.13.1 Top new questions this week

Mathematica cannot seem to properly handle times in the 1 hour before clocks go back

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239480

Using Chicago as an example; According to the current rules for applying daylight saving time, at 02:00:00 on the first Sunday of November, clocks in Chicago go back 1 hour (from Central Daylight Time ...

asked by RobertNathaniel https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=60404 24 votes

answered by Patrick Stevens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=30771 22 votes

Dataset Association of Association vs Hierarchical data

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239455

I have the following dataset:

asked by Whelp https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1287 10 votes

answered by WReach https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=142 13 votes

Plot many curves on the same graph

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239609

This plot has 40 curves on the same graph which makes it hard to see. I need to plot them on one graph. So I have an idea to plot to make it easier to see which one is larger or smaller in each range....

asked by anhnha https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=18805 9 votes

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 21 votes

Is there any other way to access the n-th element of a BlankSequence?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239659

Consider a named BlankSequence x__. How can I access the n-th element? 
Is {x}[[n]] the only ...

asked by Money Oriented Programmer https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=42141 8 votes

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 10 votes

Periodic von Neumann neighbours

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239512

From Carl Woll’s answer here, I have this code for pulling the von Neumann neighbors:

asked by TubularHell https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=76599 8 votes

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 6 votes

Equivalent of numpy’s newaxis

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239518

Numpy has a newaxis object that allows you to insert a new dimension of length 1 into an array. So after ...

asked by Dan Piponi https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=13642 8 votes

answered by swish https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2490 8 votes

Plot[Im[f[x]],...] incorrectly gives graph of identical zero function

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239728

Consider

Plot[Im[(1 + (-1)^(2/3)*x)/((-1)^(2/3) + x)], {x, 0, 1}]

At least in Mma 11 it gives the following picture: Meanwhile,

asked by Roma Lee https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=57495 7 votes

1.13.2 Greatest hits from previous weeks

How to create animated snowfall?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=16881

Well, the title is self-explanatory. What sorts of snowfall can we generate using Mathematica? There are two options I suggest to consider:

1) Continuous GIF animations with smallest possible number ...

asked by faleichik https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=219 40 votes

answered by Simon Woods https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=862 54 votes

Calling Correct Function for Plotting DiracDelta

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=3506

I am wondering what is the correct function in Mathematica to plot the true impulse function, better known as the DiracDelta[] function. When using this inside of a ...

asked by night owl https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=116 17 votes

answered by Heike https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=46 19 votes

How to manipulate 2D plots?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=7142

When it comes to visual analysis, large datasets or data with intricate internal details often makes plotting in 2D useless, as the outcome is either just a fraction of the full dataset, or no details ...

asked by István Zachar https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=89 137 votes

answered by IstvánZacharhttps://mathematica.stackexchange.com/landing/r/digest?cta=user&id=89 155 votes

Using Export[] sends the file where?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=8586

I am trying to use the Export command to convert a list of plots into a *.gif file, and the command runs and executes well, but I can’t find the file! Where is it ...

asked by Patrick Da Silva https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1785 37 votes

answered by Vitaliy Kaurov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=13 51 votes

How can I reproduce this mandala with Mathematica?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=233050

I found this image on the Internet and it is very beautiful. How can I reproduce it? The ideal would be to be able to control the colors of the outside as well as the center.

asked by Susana https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=37778 14 votes

answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 35 votes

Mathematica Minecraft

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=19669

Some time ago I asked myself: with all these great graphics and interactive capabilities of Mathematica, what kinds of 3D games can be implemented in it? And the answer which came to mind is ...

asked by faleichik https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=219 167 votes

answered by faleichikhttps://mathematica.stackexchange.com/landing/r/digest?cta=user&id=219 241 votes

Plotting the frequency spectrum of a data series using Fourier

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=18082

testData = Table[N@Sin[500 x], {x, 0, 100}]; 
ListLinePlot[Abs[Fourier[testData]], PlotRange -> Full]

Gives me Which I do not expect because the Fourier ...

asked by C. E. https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=731 14 votes

answered by KennyColnago https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=3246 16 votes

1.13.3 Can you answer these questions?

Fourier transform in polar coordinates using built-in hankel transform of the function constant 1

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239754

Like in the table of transforms https://en.wikipedia.org/wiki/Fourier_transform#Distributions,_one-dimensional the FT (Fourier transform) of \(\delta \) is 1 and the FT of 1 is \(\delta \), but in polar ...

asked by user740332 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=76926 1 vote

Exponent combinations

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239664

How can I have Mathematica represent the product of two different bases and exponents as a single power (where possible)? For example, see the product below can be expressed below:

asked by Steve237 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=69429 1 vote

Plot derivative of a real function consisting of a complex function

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239796

I obtained the data for the real and imaginary parts of a complex function \(A(x,t)=A_r(x,t)+i A_i(x,t)\) from NDSolve, both are functions of time \(t\) and space \(x\). ...

asked by Enter https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=19178 1 vote