4.27.1 Top new questions this week

4.27.1.1 Is there concise code for the list operation I want to perform?

https://mathematica.stackexchange.com/questions/151550/is-there-concise-code-for-the-list-operation-i-want-to-perform

 
Is there any concise syntax for the following partitioning of a list. Given 
{1, 2, 3, 4}, I want to get the output as shown below. I have tried various function such as Partition and others, but I  ...
 

- asked by vikas (10 votes), answered by kglr (16 votes)

4.27.1.2 Animate Koch curve generation and include a transition effect

https://mathematica.stackexchange.com/questions/151621/animate-koch-curve-generation-and-include-a-transition-effect

 
Recently, I saw two kinds of animation of Koch curve iteration generation. 
 
 
 
 
I don't know how to make this effect, now I can only do this 
 
 
 
Clear[koch]; 
koch[{A_, B_}] := 
Partition[ 
{A, (2 A  ...
 

- asked by mathe (10 votes), answered by Kuba (14 votes)

4.27.1.3 How to find the sum for each individual row in a binary matrix until the first zero is reached from left to right.

https://mathematica.stackexchange.com/questions/151396/how-to-find-the-sum-for-each-individual-row-in-a-binary-matrix-until-the-first-z

 
I have a 150 by 300 binary matrix. I would like to sum the 1's for each individual row (from left to right) until the first zero is encountered. For example, if a given row is 1 1 1 1 1 1 0 0 0 1 0 0  ...
 

- asked by Tiffany Visgaitis (7 votes), answered by eldo (8 votes)

4.27.1.4 Replace element in array by checking condition in another list

https://mathematica.stackexchange.com/questions/151293/replace-element-in-array-by-checking-condition-in-another-list

 
Im trying to escape doing double loops given the large number of items in the arrays. 
 
I have two list with a format like this: 
 
list1={{1,2,0},{1,3,0},{4,6,0},{2,3,0}} (*Third element of each item is  ...
 

- asked by Giovanni Baez (7 votes), answered by Carl Woll (8 votes)

4.27.1.5 Geometry computations add-on for Mathematica?

https://mathematica.stackexchange.com/questions/151304/geometry-computations-add-on-for-mathematica

 
I came across the problem of calculating the circumcenters of triangles symbolically within another algorithm (as well as possibly doing other similar geometry computations). I was hoping Mathematica  ...
 

- asked by Grayscale (7 votes), answered by C. E. (10 votes)

4.27.1.6 Trace of the points of intersection of two moving curves

https://mathematica.stackexchange.com/questions/151325/trace-of-the-points-of-intersection-of-two-moving-curves

 
I would like to trace the points of intersection between the polar curves 
 
r == Cos[n  + k t] 
 
 
and 
 
r == t Csc[] 
 
 
as t goes from -1 to 1. (n and k are constants, and y, r, and  relate in the  ...
 

- asked by 404UserNotFound (6 votes), answered by Carl Woll (11 votes)

4.27.1.7 How to delete the parameter of a Neural Network?

https://mathematica.stackexchange.com/questions/151591/how-to-delete-the-parameter-of-a-neural-network

 
Mathematica Neural Networks based on MXNet. 
And there is lots of model in MXNet(MXNet Model Zoo). 
 
For example,I follow a tutorial An introduction to the MXNet APIpart 4, 
It uses Inception v3(net  ...
 

- asked by partida (5 votes), answered by xslittlegrass (3 votes)