graph: minor refactor of histogram mode PR #8613

public/app/plugins/panel/graph/graph.ts

@@ -242,10 +242,8 @@ function graphDirective(timeSrv, popoverSrv, contextSrv) {
               let histMax = _.max(_.map(data, s => s.stats.max));
               let ticks = panel.xaxis.buckets || panelWidth / 50;
               bucketSize = tickStep(histMin, histMax, ticks);
-
-              data = convertToHistogramData(data, bucketSize, ctrl.hiddenSeries, panel.stack, histMin, histMax);
-
               options.series.bars.barWidth = bucketSize * 0.8;
+              data = convertToHistogramData(data, bucketSize, ctrl.hiddenSeries, histMin, histMax);
             } else {
               bucketSize = 0;
             }

public/app/plugins/panel/graph/histogram.ts

@@ -59,13 +59,11 @@ export function convertValuesToHistogram(values: number[], bucketSize: number, m
  * Convert series into array of histogram data.
  * @param data Array of series
  * @param bucketSize
- * @param stack
  */
 export function convertToHistogramData(
   data: any,
   bucketSize: number,
   hiddenSeries: any,
-  stack = false,
   min: number,
   max: number
 ): any[] {