Tensor 3.0.5 ( multiply strange behavior)

[EDPSH]

My concerns starts with tensor 3.0.5, I talked about it again and my example is T-SNE.
PHP 8.2.17 (x64)... tensor 3.0.5...
When the tensor 3.0.5 is enabled, then the results for the tsne.php and specific at line 332 of page code

$p = Matrix::quick($this->affinities($distances))
->multiply($this->exaggeration);

produce all zeros for $p

The example is with dataset iris-flower

Tensor Enabled - results
Tensor\Matrix Object
(
[a:protected] => Array
(
[0] => Array
(
[0] => 0
[1] => 0
[2] => 0
[3] => 0
[4] => 0
[5] => 0
[6] => 0
[7] => 0
[8] => 0
......

But if i disabled Tensor 3.0.5

then the results are as this ...

Tensor Disabled - results
Tensor\Matrix Object
(
[a:protected] => Array
(
[0] => Array
(
[0] => 0
[1] => 0.21491825237444
[2] => 0.22478852033193
[3] => 0.18097129837837
[4] => 0.40076888328063
[5] => 0.19018111784135
[6] => 0.22138822172434
[7] => 0.38127063420594
[8] => 0.11774974442454
........

the: $this->affinities($distances) has values
the: $this->exaggeration has values
but when put them together with tensor enabled, the results are all zero.

[andrewdalpino]

Interesting @EDPSH thank you for the fantastic writeup!

It sounds like there's a problem with the multiplyScalar() method or perhaps even the universal method multiply() that calls multiplyScalar() under the hood.

Digging deeper ...