Hi, I m having some trouble with 'null' values within a matrix. Is there a way to handle such entries? it would be great to keep them, and not replace these entries by another (numerical) value.

example: a = [[1,2],[3,4],[null,5]] $M(a) should deliver sth like: [1 2 3 4 null 5]

but actually builds a matrix like this: [1 2 3 4]

best, johsh

Just a heads up on the http://sylvester.jcoglan.com Sylvester site the link you have for the documentation (http://sylvester.jcoglan.com/docs) is broken.

Thanks for an awesome script!

mathlab has zeros and ones methods. I added an Init function that takes a value for matrix initialization.

For this version, it is just a value that will be used to init the matrix. If you prefer, we can dynamically check if v is a function. In this case Random can be implemented using: Init(n,m, Math.random); I have done the same to vector but as I don't master github. I am not sure you'll get things right.

Reading the api documentation for vector, under isAntiparallelTo() method it says: "Returns true iff vector’s direction is exactly opposed to that of the receiver, that is, if the angle between them is π." Wouldn't exactly opposite be π/2?

I'll do it. I'm currently maintaining a node port with some additional functionality (QR, LU decompositions and SVD)

https://github.com/NaturalNode/node-sylvester

I had problems building the code. Rake complained: "No such file to load -- packr", even after a

gem install packr

Including the rubygem requirement fixed this issue for me.

The link that has this exact text is broken: "the API documentation"

There is another link to the docs that works tho. Thanks for all your hard work!

Am I something wrong in below?

LineA : (1,3)(2,9), LineB : (1,6)(2,6) , Correct intersection Point should be (1.5, 6)

var a = sv.Line.create([1,3],[2,9]); var b = sv.Line.create([1,6],[2,6],); console.log('intersectionWith : ', a.intersectionWith(b)); But it result intersectionWith : [3.000000000000011, 12.000000000000052, 0] intersects : true pointClosestTo : [3.000000000000011, 12.000000000000052, 0] reflectionIn : { anchor: [-0.800000000000003, 3.600000000000001, -1.1617635945578294e-16], direction: [0.41216786985544684, 0.9111079228383558, 1.2601095422223854e-17] }

HI,

I have been using Sylvester as it is posted on the website v 0.1.3. The Unit testing framework I am using reported a global variable "j".

I tracked it down to the function "toRightTriangular" where "j" is used without being declared.

This seems already to have been fixed on the repository, but I am new to GIT, and don't know how to get the latest version.

Thanks Jacob

Is something like this correct ? Matrix.RotationX(value).add(Matrix.RotationY(value)); How would i go about if i wanted to get the rotation on both axis by a given value ?

Hello. First of all, thanks for this awesome library. I noticed that in the source code, Vector.prototype.rotate also can take in a rotation matrix aside from just an angle in radians. Was thinking if it could also be added in the documentation.

Let me know what you think. Thank you.

I'm working in 2D only but Line.pointClosestTo returns 3D vector with z being 0, can you add Vector.to2D() function that would drop third element of a vector, right now there is Vector.to3D which adds zero, this would remove it. It is problem because when I want to use it later:

Vector.create([2, 0]).subtract(Vector.create([1, 0, 0])) - returns null

In order to make it work I need to use temp variable: var t = Vector.create([1, 0, 0]); t = Vector.create([t[0], t[1]]); Vector.create([2, 0]).subtract(t);

Which is unwieldy but more importantly cannot be chained.

Someone has put Sylvester into a handy npm module: sylvester-es6. It's only a matter a time when the two versions diverge and the documentation no longer matches. Maybe it's time for a major update with incorporation of ES6, NPM and other relevant JS tools. I'm currently using sylvester-es6 for this.

Hello expert,

I have discovered the function "Polygon.prototype.scale(k, point)" always scale up/down the polygon in all directions (including X, Y, Z). However, I'd like to scale the polygon in X direction.

Could you please give me a few of algorithm suggestions?

Hello expert,

The existing API online documentation (http://sylvester.jcoglan.com/docs.html) is out of date. Therefore, the latest docs update is desirable.