3.18.1 Top new questions this week

3.18.1.1 Huge bug involving MultinormalDistribution?

http://mathematica.stackexchange.com/questions/129916/huge-bug-involving-multinormaldistribution

 
Bug introduced in 8.0 or earlier and persisting through 11.0.1 
 
 
 
I found a strange behavior regarding the CDF of the bivariate Normal distribution 
 
...
 

- asked by fwgb (21 votes), answered by Eric Towers (19 votes)

3.18.1.2 GeoDistance - higher spatial resolution / precision?

http://mathematica.stackexchange.com/questions/130044/geodistance-higher-spatial-resolution-precision

 
I'm having a small problem with GeoDistance. 
 
I've chosen a target city -- San Francisco -- and I've computed distances from SF to five other cities. Then I draw circles around each city, with radius  ...
 

- asked by ConvexMartian (9 votes), answered by jose (4 votes)

3.18.1.3 How to extract the first dimension in TimeSeries?

http://mathematica.stackexchange.com/questions/129836/how-to-extract-the-first-dimension-in-timeseries

 
I want to extract the first dimension in TimeSeriesfor example: 
 
 
 
So I use this code: 
 
data = Normal@AudioLocalMeasurements[ExampleData[{"Audio", "PianoScale"}],"MFCC"]; 
Thread[{data[[All, 1]],  ...
 

- asked by partida (9 votes), answered by kglr (6 votes)

3.18.1.4 How to recover Pauli matrices properties in Mathematica?

http://mathematica.stackexchange.com/questions/129799/how-to-recover-pauli-matrices-properties-in-mathematica

 
I want to do a cross or dot product involving a vector of Pauli matrices 
=(1,2,3); for example, x=2i or .=3I. 
 
Is there a simple way to do these operations?
 

- asked by user3654016 (8 votes), answered by corey979 (10 votes)

3.18.1.5 Flatten sublists within a bigger list

http://mathematica.stackexchange.com/questions/130011/flatten-sublists-within-a-bigger-list

 
Really sorry if this question is a duplicate. I couldn't find exactly what I was looking for. 
 
Here is a list I have: 
 
{{{0. + 0.1875 I, 0. + 0.105469 I, 0. + 0.03125 I, 0. + 0.00390625 I, 
0. +  ...
 

- asked by jrekier (7 votes), answered by Edmund (6 votes)

3.18.1.6 7-dimensional cross product

http://mathematica.stackexchange.com/questions/129863/7-dimensional-cross-product

 
How to define a 7-dimensional cross product? 
 
$$\begin{aligned}\mathbf {x} \times \mathbf {y} =(x_{2}y_{4}-x_{4}y_{2}+x_{3}y_{7}-x_{7}y_{3}+x_{5}y_{6}-x_{6}y_{5})\,&\mathbf {e}  ...
 

- asked by corey979 (7 votes), answered by Sumit (4 votes)

3.18.1.7 How to draw a clock-diagram?

http://mathematica.stackexchange.com/questions/129960/how-to-draw-a-clock-diagram

 
I found a clock-diagram in a paper, so I would like to draw it in Mathematica. The main trouble for me is the corresponding line segments on the circle. 
 
I would let the data1 lie the outside on the  ...
 

- asked by user123 (7 votes), answered by Feyre (7 votes)