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util.js
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util.js
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// UTILS ---
export function get_random_int(max) {
return Math.floor(Math.random() * Math.floor(max));
}
export function to_1d(_input_2d){
let _dim = _input_2d.length;
var out_1d = []
for (var x = 0; x < _dim; x+=1){
for (var y = 0; y < _dim; y+=1){
out_1d.push(_input_2d[x][y]);
}
}
return out_1d;
}
export function get_random_int_min_max(min, max) {
return Math.random() * (max - min) + min;
}
export function to_2d(_input_1d){
let _dim = Math.round(Math.sqrt(_input_1d.length))
// console.log(_dim)
if(_input_1d.length % _dim != 0){
throw "not square";
alert("not square");
}
var out_2d = []
for (var y = 0; y < _dim; ++y){
var row = [];
for (var x = 0; x < _dim; ++x){
row.push(_input_1d[y*_dim+x]);
}
out_2d.push(row);
}
return out_2d;
}
export function pixel_to_index(x,y,dim,width){
console.log(x,y)
let idim = width / dim;
return [Math.floor(x/idim), Math.floor(y/idim)]
}
export function generate_random_bipolar_vector(_num_unit){
let _bipolar_1d = []
for(var i = 0; i < _num_unit; ++i){
let rand_num = get_random_int_min_max(-10,10);
_bipolar_1d.push(Math.sign(rand_num));
}
return _bipolar_1d
}
export function add_noise_to_vector(_input_vector, percentage){
let max_value = Math.round(percentage * _input_vector.length);
for(var i = 0; i < max_value; ++i){
let rand_int = get_random_int(_input_vector.length - 1);
_input_vector[rand_int] *= -1.0
}
return _input_vector
}