BNW/sourcecodes/network_layout_inv.php, branch main

Guard arithmetic on file/shell-output-derived values against non-numeric strings

2026-08-17T19:53:21+00:00

PHP 8 throws a fatal TypeError for arithmetic (+ - * /) on a non-numeric string ("Unsupported operand types"); PHP 7.4 only warned and treated it as 0. Several files perform arithmetic directly on values parsed from intermediate state files (nnode.txt, nrows.txt, structure_input*.txt) or from `dot -Tplain` output, with no is_numeric() check — safe as long as those files are well-formed, but a crash risk if a file is missing/empty/truncated or a `dot` output line doesn't parse as expected. Affected: runtime_check.php ($node, $nrows), remove_variables.php and create_tiers_gom_part1.php ($maxplist=$node-1), mat_structure.php (matrix cell multiplication), and the four network_layout_{evd,inv}[,_2].php files ($r_index=$node+N and the dot-output-derived $cell arithmetic in the _2 variants). Fix pattern: coalesce to 0 via `is_numeric($x) ? $x : 0` before the arithmetic, matching PHP 7.4's original fallback-to-0 behavior instead of crashing. Verified empirically against PHP 8.3.28 with runtime_check.php and mat_structure.php: previously, a missing/empty source file caused TypeError: Unsupported operand types: string - int (or string * int) after the fix, the same missing-file scenario produces only the pre-existing "undefined array key" warnings (same as PHP 7.4) and the function completes and returns a value instead of crashing. Reviewed by: Frederick M Muriithi

Moving final GENENET8 version to master

2021-02-24T21:19:03+00:00

GENENET8 update

2021-02-24T20:36:59+00:00

New parameter learning options

2018-09-14T04:59:20+00:00

The main change here is in the parameter learning methods. The parameters that are learned at first (i.e., if there is no evidence) are the distributions that are found directly in the data. I had to create or significantly modify several BNT files for this. If there is evidence, the parameters are learned using a Dirichlet prior. This only required a couple of small changes to the BNW parameter learning files.

Bug fixes, code comments, and minor changes

2018-04-25T21:43:19+00:00

Separating Octave and php calculations

2018-03-15T04:19:16+00:00

Add files via upload

2017-09-14T20:57:50+00:00