The histogram visualization calculates the distribution of values and presents them as a bar chart. The Y-axis and the height of each bar represent the count of values that fall into each bracket while the X-axis represents the value range.
Histogram visualization supports time series and any table results with one or more numerical fields.
## Display options
Use the following options to refine your visualization.
### Bucket size
The size of the buckets. Leave this empty for automatic bucket sizing (~10% of the full range).
### Bucket offset
If the first bucket should not start at zero. A non-zero offset has the effect of shifting the aggregation window. For example, 5-sized buckets that are 0-5, 5-10, 10-15 with a default 0 offset would become 2-7, 7-12, 12-17 with an offset of 2; offsets of 0, 5, or 10, in this case, would effectively do nothing. Typically, this option would be used with an explicitly defined bucket size rather than automatic. For this setting to affect, the offset amount should be greater than 0 and less than the bucket size; values outside this range will have the same effect as values within this range.
### Combine series
This will merge all series and fields into a combined histogram.
Set the mode of the gradient fill. Fill gradient is based on the line color. To change the color, use the standard [color scheme]({{< relref "../panels/working-with-panels/apply-color-to-series.md" >}}) field option.
