Linked Questions

11
votes
1answer
272 views

Incompatible InterpolatingFunction between V9 (and earlier) and V10

Bug introduced in 10.0.0 and fixed in 10.0.1 I am encountering compatibility issues when loading DumpSave(d) definitions in V10 that have been created with earlier ...
8
votes
1answer
273 views

How does Hash calculate hash for strings?

I have this code Hash["a","SHA"] Hash[ToCharacterCode["a"],"SHA"] and I was expecting to get the same result, but somehow it is different. My question is: how ...
7
votes
1answer
133 views

Stabilized Inverted Pendulum Blog Post Broken in 12.0?

One of the old Wolfram blog posts that I use frequently is this demonstration of the LQR gains computation. https://blog.wolfram.com/2011/01/19/stabilized-inverted-pendulum/ I've been able to trust ...
7
votes
1answer
156 views

What is the logiс behind handling alpha-channel by various image-processing functions?

(Cross-posted on Wolfram Community.) When working on the answer to this question I discovered that starting from Mathematica 10.0 the behavior of such functions as ...
7
votes
1answer
96 views

A bug and inconsistency in current image arithmetic operations?

Let us start from a single-pixel RGBA image: i = Image[{{{0., .4, .7, .8}}}, Real, ColorSpace -> "RGB"]; Multiplying by .5 ...
6
votes
1answer
352 views

FindFaces in Mathematica 11.3

I just upgraded to Mathematica 11.3. but now my FindFaces instructions do not work anymore. I guess they changed the syntax in 11.3. Here is the original code: <...
5
votes
1answer
68 views

MatrixConditionNumber does not work in version 12.0

A = {{1., 0.}, {0., 2.}}; LinearAlgebra`MatrixConditionNumber[A]
5
votes
1answer
166 views

What has changed in PolyhedronData in V11

As we saw in: Demonstration site CDF error correction question PolyhedronData has changed. I've failed to find any information about how the syntax changed in V11....
5
votes
1answer
231 views

Is it safe to change the value of $TimeZone?

I'd like to configure some of my notebooks to assume all calculations using dates, times and locations (notably AstronomicalData , but others too) take place at the ...
4
votes
1answer
260 views

MachinePrecision versus $MachinePrecision in NDSolve

I'd like to understand why one of these inputs gives me an error and the other doesn't: ...
1
vote
1answer
98 views

Problem with “MediaTools`” in Mathematica 12

I asked here for a solution how single video images can be extracted very fast from avi files. Piotr Wendykier gave a solution for Mathematica 11.3. Now I'm using Mathematica 12 and his solution ...
1
vote
1answer
126 views

Solving system of differential equations in loop with recursive variable

Backslide introduced in 11.3, fixed in 12.0. I've been posting various questions about similar pieces of code all year, so if this looks familiar you may have seen another one of my posts, but this ...
0
votes
1answer
110 views

Mathematica 12 compatibility with earlier versions under macOS 10.15 Catalina [closed]

I currently run the following: Mathematica 10.3.0.0 on a Mac Pro (Late 2013)running macOS Mojave Version 10.14.6. I want to upgrade the OS to macOS 10.15 Catalina. To do so, I understand that ...
20
votes
0answers
276 views

Breaking change of Total in Mathematica 12.0?

Total has been changed in Mathematica 12.0. The documentation seems to contradict itself. In one line it states: Total[ $f[ e_1,e_2,...]$ ] gives the sum of the $e_i$ for any head $f$ In the next ...
13
votes
0answers
724 views

Interpolation on an unstructured (mostly-structured) grid in 4D+

I frequently need to perform interpolations on an unstructured grid. Mostly, with the purpose of filling grid holes and then later continue with regular grid interpolations. Mathematica V9 and V10 ...

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