Docs · Visuals
Histogram guide
How your values are spread, bin by bin.
Fields
| Field well | What to put in it |
|---|---|
| Value | The number to count, such as fill weight or delivery days. |
| Detail | The field that makes one value per row, such as Bottle or Order ID. |
| Group (Pro) | Two groups drawn over each other on the same bins, such as Line 1 and Line 2, or this year and last year. |
| Lower limit (Pro) | The lower spec limit, as a measure. You can also type it in Format › Spec limits. |
| Upper limit (Pro) | The upper spec limit, as a measure. You can also type it in Format › Spec limits. |
Set it up
- Add Histogram to the report page (see Install the visuals) and drag in the fields above.
- In Format › Bins, choose Automatic, Set width or Set number, and Count or Percent.
- Format › Lines turns the mean, the median and their labels on or off, and adds a density or normal curve (Pro).
- Format › Spec limits takes the limits when you have no measures for them, and turns Cp and Cpk and the shading outside the limits on or off (Pro).
In the report
- Hover a bar for its range, its count and its share (per group when there are two).
- Click a bar to filter the report to the rows in it; the other bars dim. When another visual is selected, each bar shows the highlighted part.
- Light or dark background, high-contrast mode, and your own colours.
- Tab into the chart and move between bars with the arrow keys; screen readers hear each bar’s range and count.
- The format pane, the labels and the messages are in English and Norwegian.
Pro features
- Curve: a smooth density curve, or the normal curve with the same mean and standard deviation
- Two groups: drawn over each other on the same bins, each with its own mean, median and curve
- Spec limits: limit lines, the area outside shaded, bars outside in orange, Cp, Cpk and the share outside
Pro features need a licence key for Histogram or Everything, or a 14-day trial key. Without a valid key, Histogram draws one histogram of all values with no curve and no limits, with a short notice above the chart and a “Try Pro free” button. Everything else keeps working. See Add your licence key.
Something not right?
Check Questions and answers, or write to support@getgrafpoint.com saying which visual and where the report runs (Desktop, the Power BI service or Report Server), with a screenshot made with sample data.