Store matrices in dictionary

Questions
1

hey, i was trying to store these feedback matrices in a dictionary with:

matrices.do{|matrix, i|
	~fbMatrixDict.add(i.asSymbol -> matrix);
};

Is there a method for getting the name of the array so it could be used as a key inside the dictionary?
so i could use the dictionary like this: ~fbMatrixDict[\householder];
instead of: ~fbMatrixDict[\0];

Ive looked at the helpfile of Array and couldnt find it.

(
var matrices, householder, puckette, hadamard_4x4, hadamard_8x8, hadamard_16x16;

householder = [
	[ -1.0, 1.0, 1.0, 1.0 ],
	[ 1.0, -1.0, 1.0, 1.0 ],
	[ 1.0, 1.0, -1.0, 1.0 ],
	[ 1.0, 1.0, 1.0, -1.0 ]
]  * 0.5;

puckette = [
	[0, 1, 1, 0],
	[-1, 0, 0, -1],
	[1, 0, 0, -1],
	[0, 1, -1, 0]
]  * sqrt(2).reciprocal;

hadamard_4x4 = [
	[ 1,  1,  1,  1 ],
	[ 1, -1,  1, -1 ],
	[ 1,  1, -1, -1 ],
	[ 1, -1, -1,  1 ],
]  * ( sqrt(2).reciprocal * sqrt(2).reciprocal );

hadamard_8x8 = [
	[ 1,  1,  1,  1,  1,  1,  1,  1 ],
	[ 1, -1,  1, -1,  1, -1,  1, -1 ],
	[ 1,  1, -1, -1,  1,  1, -1, -1 ],
	[ 1, -1, -1,  1,  1, -1, -1,  1 ],
	[ 1,  1,  1,  1, -1, -1, -1, -1 ],
	[ 1, -1,  1, -1, -1,  1, -1,  1 ],
	[ 1,  1, -1, -1, -1, -1,  1,  1 ],
	[ 1, -1, -1,  1, -1,  1,  1, -1 ],
]  * ( sqrt(2).reciprocal * sqrt(2).reciprocal * sqrt(2).reciprocal );

hadamard_16x16 = [
	[ 1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1],
	[ 1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,  -1],
	[ 1,   1,  -1,  -1,   1,   1,  -1,  -1,   1,   1,  -1,  -1,   1,   1,  -1,  -1],
	[ 1,  -1,  -1,   1,   1,  -1,  -1,   1,   1,  -1,  -1,   1,   1,  -1,  -1,   1],
	[ 1,   1,   1,   1,  -1,  -1,  -1,  -1,   1,   1,   1,   1,  -1,  -1,  -1,  -1],
	[ 1,  -1,   1,  -1,  -1,   1,  -1,   1,   1,  -1,   1,  -1,  -1,   1,  -1,   1],
	[ 1,   1,  -1,  -1,  -1,  -1,   1,   1,   1,   1,  -1,  -1,  -1,  -1,   1,   1],
	[ 1,  -1,  -1,   1,  -1,   1,   1,  -1,   1,  -1,  -1,   1,  -1,   1,   1,  -1],
	[ 1,   1,   1,   1,   1,   1,   1,   1,  -1,  -1,  -1,  -1,  -1,  -1,  -1,  -1],
	[ 1,  -1,   1,  -1,   1,  -1,   1,  -1,  -1,   1,  -1,   1,  -1,   1,  -1,   1],
	[ 1,   1,  -1,  -1,   1,   1,  -1,  -1,  -1,  -1,   1,   1,  -1,  -1,   1,   1],
	[ 1,  -1,  -1,   1,   1,  -1,  -1,   1,  -1,   1,   1,  -1,  -1,   1,   1,  -1],
	[ 1,   1,   1,   1,  -1,  -1,  -1,  -1,  -1,  -1,  -1,  -1,   1,   1,   1,   1],
	[ 1,  -1,   1,  -1,  -1,   1,  -1,   1,  -1,   1,  -1,   1,   1,  -1,   1,  -1],
	[ 1,   1,  -1,  -1,  -1,  -1,   1,   1,  -1,  -1,   1,   1,   1,   1,  -1,  -1],
	[ 1,  -1,  -1,   1,  -1,   1,   1,  -1,  -1,   1,   1,  -1,   1,  -1,  -1,   1],
] * ( sqrt(2).reciprocal * sqrt(2).reciprocal * sqrt(2).reciprocal * sqrt(2).reciprocal );

matrices = [ householder, puckette, hadamard_4x4, hadamard_8x8, hadamard_16x16 ];

~fbMatrixDict = Dictionary.new;

/*
~fbMatrixDict.add(\householder -> householder);
~fbMatrixDict.add(\puckette -> puckette);
~fbMatrixDict.add(\hadamard4x4 -> hadamard_4x4);
~fbMatrixDict.add(\hadamard8x8 -> hadamard_8x8);
~fbMatrixDict.add(\hadamard16x16 -> hadamard_16x16);
*/

matrices.do{|matrix, i|
	~fbMatrixDict.add(i.asSymbol -> matrix);
};
)

~fbMatrixDict[\4];

~fbMatrixDict[\householder];
~fbMatrixDict[\puckette];
~fbMatrixDict[\hadamard4x4];
~fbMatrixDict[\hadamard8x8];
~fbMatrixDict[\hadamard16x16];

~fbMatrixDict.clear;
2

Arrays don’t have names.

You’re storing them in variables, but the variable name is not a property of the array. So there is no way to ask an array what its name is.

hjh

3

thank you. is there another good solution?

4

Why not directly store it in a dictionary?

(
// make a library of matrices
var matlib = ();
matlib[\myspecialmatrix] = [[1, 0], [0,1]];
matlib[\anotherone] =  [ [1,0,0], [0,1,0], [0,0,1]] * sqrt(2).reciprocal;

// use one
matlib[\anotherone].postln;
)
5

yes of course :slight_smile:
ive been thinking way too complicated.
thanks a lot :slight_smile: