4.38.1 Top new questions this week

4.38.1.1 Frown for a sex change, or, how do I unbork the "FacialGender" classifier in 11.2?

https://mathematica.stackexchange.com/questions/156847/frown-for-a-sex-change-or-how-do-i-unbork-the-facialgender-classifier-in-11

 
The limits of machine learning.  I thought the new "FacialGender" option for Classifier would be an amusing thing to explore. 
 
 
 
So far, so good. But that's me with bed-head. So let's try a picture  ...
 

- asked by Verbeia (17 votes), answered by Searke (2 votes)

4.38.1.2 Improve the mesh smoothing procedure

https://mathematica.stackexchange.com/questions/156611/improve-the-mesh-smoothing-procedure

 
My question is inspired by this answer about meshing with quadrilateral elements. 
 
The following functions are my (naive) try of implementing the Laplacian smoothing. I find interior nodes in the mesh  ...
 

- asked by Pinti (11 votes), answered by user21 (10 votes)

4.38.1.3 Possible bug in RegionUnion or related functions?

https://mathematica.stackexchange.com/questions/157031/possible-bug-in-regionunion-or-related-functions

 
Functions for derived geometric regions (RegionUnion and related) have been significantly updated in MMA 11.2 and now this simple example doesn't work any more as expected. Could this be a bug or I am  ...
 

- asked by Pinti (8 votes), answered by Szabolcs (5 votes)

4.38.1.4 Dataset - append row with a value which depends on two other rows

https://mathematica.stackexchange.com/questions/156980/dataset-append-row-with-a-value-which-depends-on-two-other-rows

 
I have go through the forum but did not see this question. Hope I don't miss it. 
 
I want to add a new colum "C" to a dataset with existing columns named "A" and "B". 
The value of "C" shall be the  ...
 

- asked by Porty (7 votes), answered by WReach (6 votes)

4.38.1.5 How to tell Mathematica to do this with decimal part of real number?

https://mathematica.stackexchange.com/questions/156823/how-to-tell-mathematica-to-do-this-with-decimal-part-of-real-number

 
My apologies if this was asked here before. 
 
My friend and I want to do this: 
 
Suppose that we have some real number $a. a_1 a_2...a_n...$ where $a_i$ are digits in the set $\{1,2,3,4,5,6,7,8,9,0\}$  ...
 

- asked by Antoine de Paladin (7 votes), answered by Edmund (6 votes)

4.38.1.6 FullForm of b/c and c/b with different order

https://mathematica.stackexchange.com/questions/156757/fullform-of-b-c-and-c-b-with-different-order

 
I am studying Mathematica myself and doing some exercises for improvement. 
 
 
Question: Try to guess the internal forms of b/c and c/b. Verify your 
answer using FullForm. 
 
 
Here is what I got by  ...
 

- asked by anhnha (7 votes), answered by Mr.Wizard (6 votes)

4.38.1.7 Generate random walk on a graph

https://mathematica.stackexchange.com/questions/156626/generate-random-walk-on-a-graph

 
I have a graph with 100 nodes and 200 edges.  How can I generate a random walk in it and animate it?
 

- asked by nasha amalina (7 votes), answered by rhermans (13 votes)