Python 转 C# 多维数组

Question

I need to translate this snippet from python to c#:

def _get_w_matrix(quaternions):
    w_matrix = [[[q[3], q[2], -q[1], q[0]],
                 [-q[2], q[3] , q[0], q[1]],
                 [q[1], -q[0], q[3], q[2]],
                 [-q[0], -q[1], -q[2], q[3]]] for q in quaternions] 

where quaternions is something like

[[0. 0. 0. 0.]
 [0. 2. 2. 0.]
 [2. 3. 1. 0.]]

I don't understand which type of object is returned and how to write it down.

EDIT: I'm using Numpy for .NET, so in my c# code the variable quaternion is of type NDarray.

Answer 1

The Python type() function combined with the print() function are two functions you can use for debugging the look and type of the w_matrix list .

I wrote this code for debugging purposes:

def _get_w_matrix(quaternions):
    w_matrix = [[[q[3], q[2], -q[1], q[0]],
                 [-q[2], q[3] , q[0], q[1]],
                 [q[1], -q[0], q[3], q[2]],
                 [-q[0], -q[1], -q[2], q[3]]] for q in quaternions] 
    return w_matrix

inputMatrix = [[0,0,0,0],
 [0,2,2,0],
 [2,3,1,0]]

test = _get_w_matrix(inputMatrix)

print("matrix created by function: ")
print(test)
print("type of matrix:")
print(type(test))

which returns:

matrix created by function: 
[[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]], [[0, 2, -2, 0], [-2, 0, 0, 2], [2, 0, 0, 2], [0, -2, -2, 0]], [[0, 1, -3, 2], [-1, 0, 2, 3], [3, -2, 0, 1], [-2, -3, -1, 0]]]
type of matrix:
<class 'list'>

The type is a python list of list of list with integers. I am not an expert at c# but that should correspond to something like List<List<List>>>