jayhaluska / isolation-forest-js Goto Github PK

for (let i = 0; i < this.numberOfTrees; i++) {
      const subsample = this.getSubsample(this.subsamplingSize);

      const iTree: ITree = new ITree(this.X, heightLimit);
      this.trees.push(iTree);
}

The subsample result is never used, so subsampling never happens

Hi! Can you perhaps share an example of how to use this module?
I am curious to know what type of data it accepts for example

Thanks for building this package. I keep running into this error, so the pkg cannot work. Please help.

`import {IsolationForest} from 'isolation-forest';
^

SyntaxError: Unexpected token {
at Module._compile (internal/modules/cjs/loader.js:743:23)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:810:10)
at Module.load (internal/modules/cjs/loader.js:666:32)
at tryModuleLoad (internal/modules/cjs/loader.js:606:12)
at Function.Module._load (internal/modules/cjs/loader.js:598:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:862:12)
at `internal/main/run_main_module.js:21:11``

I'd like to request a feature be added so we can score a single new DataObject from an existing iForest. I believe this can be accomplished by adding a function similar to what's below. Please note I haven't tested this--just typed it out through this ticket and essentially just modified your scores function.

public score(x: DataObject): number {
  let pathLength: number = 0;
  for(let j = 0; j < this.numberOfTrees; j++) {
    pathLength += this.trees[j].pathLength(x, this.trees[j].getRootNode(), 0)
  }
  const meanPathLength = pathLength / this.numberOfTrees;
  const score = Math.pow(2, -(meanPathLength / averagePathLength(this.subsamplingSize)));
  return score;
}

The scores function could be refactored to call score if you'd like. If it's helpful I'd be happy to put a PR up.

Thanks for this library! Extremely helpful and easy to use.