I would like to fit a 2D array by an elliptic function: (x / a)² + (y / b)² = 1 ----> (and so get the a and b) And then, be able to replot it on my graph. I found many examples on internet, but n...

Is there a way to flip the SVG coordinate system so that [0,0] is in the lower left instead of the upper left?

What I am looking for: A uniform way to rotate a vector (X, Y, Z) from ENU to NED and vice versa The same uniform way to rotate a quaternion from ENU to NED and vice versa It would be appreciated i...

How do you convert between Cartesian and Polar (and back) coordinate systems in 3D space? Preferably with a c# example but anything would really be appreciated. Thanks! Edit When 20% of the change...

How can I create Cartesian Product of dynamic number of lists in Dart Language ? For example I have two lists: X: [A, B, C]; Y: [W, X, Y, Z] I want to create lists like this [AW, AX, AY, AZ, BW,...

I have two cartesian coordinate systems with known unit vectors: System A(x_A,y_A,z_A) and System B(x_B,y_B,z_B) Both systems share the same origin (0,0,0). I'm trying to calculate a quaternion...

Let's say I have a matrix x which contains 10 rows and 2 columns. I want to generate a new matrix M that contains each unique pair of rows from x - that is, a new matrix with 55 rows and 4 columns....

I need to do a cartesian product of two data frames. For example, A = id weight type 10 20 a 10 30 b 25 10 c B = date report 2007 y 2008 n then C would be like after doing cartesian...

I need to create a communicator with cube topology and then select face of the cube, using the MPI_Cart_Shift implemented messaging between processes that are on the brink. For example I am proce...

I have a one column table with three rows as below: col1 team1 team2 team3 team4 I want to do a self cartesian join with result as below: team1, team2 team1, team3 team1, team4 team2, team3 team...

I am totally new to SVG, so please bear with me. I read a lot of articles on the subject, and everyone is pointing to solutions like d3.js, which is, in my opinion, way to complex for the simple ta...

Suppose we have a list L. The cartesian product L x L could be computed like this: product = [(a,b) for a in L for b in L] How can the cartesian power L x L x L x ... x L (n times, for a g...

I am currently working on a project that has a vector containing X and Y coordinates for approximately 800 points. These points represent an electric network of lines. My goal is to compute the sh...

Take a look at the example here: http://www.brianhare.com/physics/so.html Take a look at console.log where I am using these two main functions: function distanceBetween2pts(x1, y1, x2, y2) { co...

Given a large set (tens of thousands up to millions) of disordered points represented as 3D Cartesian vectors, what's a good algorithm for making a regular square grid (of user-defined spacing) tha...

Analyzing Eye-movements on a screen, I set my origin to the bottom left corner of it (Hard to modify at that point). Trying to compute distance between some points and the center of the screen I ...

I created a map using Google Maps API that highlights all Minnesota counties. Basically, I created the county polygons using a set of longitudes/latitudes coordinates. Here's a screenshot of the ge...

I have few Cartesian points of the form : (x,y) where x and y both are non-negative integers. For e.g. (0,0) , (1,1), (0,1) I need an algorithm to arrange the above points in such a way that go...

Possible Duplicate: Inner join vs Where Today I got into a debate with my project manager about Cartesian products. He says a 'natural join' is somehow much better than using 'select ...