4.20.1 Top new questions this week

4.20.1.1 PerformanceGoal option ignored in V11.1

https://mathematica.stackexchange.com/questions/146214/performancegoal-option-ignored-in-v11-1

 
Bug introduced in 11.1 
 
 
[CASE:3892079] was created 
 
[...] I have reproduced this problem with PerformanceGoal in version 11.1 and reported the issue to our developers [...] 
 
 
 
 
Take this code: 
 
...
 

- asked by Kuba (14 votes), answered by Kuba (15 votes)

4.20.1.2 Can I build my own curated data function?

https://mathematica.stackexchange.com/questions/146220/can-i-build-my-own-curated-data-function

 
I love the huge curated datasets, but they don't cover everything. I have my own huge dataset which is too much to distribute as an EntityStore so is there a way to build my own analog of, say,  ...
 

- asked by MB1965 (13 votes), answered by MB1965 (16 votes)

4.20.1.3 Support for low-complexity (compressible) lists

https://mathematica.stackexchange.com/questions/146244/support-for-low-complexity-compressible-lists

 
By "low-complexity list" I mean a list like the following: 
 
lcl = {17, 17, 17, 17, 17, 
21, 21, 21, 21, 21, 21, 21, 21, 
11, 11, 11, 11, 11, 11, 11} 
 
 
It contains 20 elements, but only 3  ...
 

- asked by kjo (10 votes), answered by Mr.Wizard (6 votes)

4.20.1.4 Automating documentation generation

https://mathematica.stackexchange.com/questions/146670/automating-documentation-generation

 
Outside of kernel symbols Mathematica provides access to lots of usage info, e.g. DownValues, Options, Messages, etc. 
 
Most languages, if given this sort of info, would be able to provide an automatic  ...
 

- asked by MB1965 (9 votes), answered by MB1965 (10 votes)

4.20.1.5 Trace of - 1  expression

https://mathematica.stackexchange.com/questions/146506/trace-of-1-expression

 
I'm trying to understand Trace. Usually it doesn't repeat but it adds {-1,-1} for his simple expression after having a correct result. 
 
-{1}//Trace 
 
 
 
{-1, {-1}, {-1, -1}, {-1}} 
 
 
Why -{1}//Trace is  ...
 

- asked by io_tuta (9 votes), answered by Michael E2 (7 votes)

4.20.1.6 How to import a Tensorflow model?

https://mathematica.stackexchange.com/questions/146216/how-to-import-a-tensorflow-model

 
I've trained a network in Tensorflow and have the checkpoint files, I'd like to if anyone has written a parser or importer to pull the evaluation graph and/or weights into Mathematica?
 

- asked by user5601 9votes

4.20.1.7 intersection between two 2D arrays with labeled data is slow

https://mathematica.stackexchange.com/questions/146558/intersection-between-two-2d-arrays-with-labeled-data-is-slow

 
Here is how to Generate data 
 
the function is below with two images to generate data 
 
img1 
 
 
 
img2 
 
 
segmentImage[binarizedMask_?ImageQ] := 
Module[{seg, areas, indexMaxarea, maxArea}, 
seg =  ...
                                                                                  

                                                                                  
 

- asked by Ali Hashmi (8 votes), answered by Carl Woll (6 votes)