Method computeDataIndices

js/src/Hist.ts:467–488

(indices)

  }

  private computeDataIndices(indices) {
    //input is a list of indices corresponding to the bars. Output is
    //the list of indices in the data
    const intervals = this.reduceIntervals(indices);
    if (intervals.length === 0) {
      return [];
    }

    const x_data = this.model.get('sample');
    const num_intervals = intervals.length;
    const indices_data = new Uint32Array(_.range(x_data.length));
    const selected = indices_data.filter((index) => {
      const elem = x_data[index];
      for (let iter = 0; iter < num_intervals; iter++) {
        if (elem <= intervals[iter][1] && elem >= intervals[iter][0]) {
          return true;
        }
      }
      return false;
    });
    return selected;
  }

  private reduceIntervals(indices: number[]) {
    //for a series of indices, reduces them to the minimum possible