Heat Map

A heat map allows graphing the individual values contained in a matrix through colors. The metrics aggregation determines the color for each matrix position.

Metric Aggregations:

• Count: The count aggregation returns a raw count of the elements in the selected index pattern.
• Average: This aggregation returns the average of a numeric field. You should select a field from the drop-down.
• Sum: The sum aggregation returns the total sum of a numeric field. Select a field from the drop-down.
• Min: The min aggregation returns the minimum value of a numeric field. Select a field from the drop-down.
• Max: The max aggregation returns the maximum value of a numeric field. Select a field from the drop-down.
• Unique Count: The cardinality aggregation returns the number of unique values in a field. Select a field from the drop-down.

Enter a string in the field Custom Label to change the default display label.

However, you can split the axis through buckets aggregation to display specific information based on a determinate field.

Buckets aggregation:

1. Date Histogram

   A date histogram is built from a numeric field and organized by date.

   You need to select the time in "Field" and specify in "Minimum intervals" a minimum time frame in minutes, hourly, daily, weekly, monthly, or yearly.

   You can also specify a custom interval frame by selecting "Custom interval?", and specifying a time unit  in the text field "Fixed interval."

   Custom interval time units are ms for milliseconds, s for seconds, m for minutes, h for hours, d for days.

   Enter a string in the field Custom label to change the display label.

2. Terms

   A terms aggregation enables you to specify the order ascendent or descendent from the n elements "Size" of a given field to display, ordered by (metric or alphabetical.)

   Enter a string in the field Custom label to change the display label.

   You can add sub-buckets by clicking the button Add sub-buckets.

If you want to customize your heat chart's appearance, click on the Options tab to modify (x-axis, y-axis, legend, visual map, toolbox, data zoom, and grid.)