## heatmap prefab

Version 2.32
Prefabs

Manual page for heatmap_prefab(PL)

View the heatmap prefab examples

heatmap is a prefab for producing heatmaps, density grids and similar displays.`` Data can be continuous numeric or categorical. Numeric data will be fitted into bins.`` Instance counts are displayed unless `contentfield` is specified.`` The binsizes and color breakdown can be automatically determined or specified explicitly for faster performance.``

## Parameters

Prefab parameter name | Data type | Default | Description | Examples (ignore line wrapping)
Standard parameters |  |  | Most of the standard prefab parameters may be used. You must specify data (the name of the input data file). The clickmap parameters and ptselect aren't available with this prefab. You can't do an x axis along the top or a Y axis along the right side with this prefab.
x | data field | must be specified | Identifies the data field that will hold X component. | `x=2 x=pmb`
y | data field | must be specified | Identifies the data field that will hold Y component. | `y=3 y=pmr`
xcats | `yes` or `no` | `no` | If `yes`, indicates that X component is categorical, not continuous numeric. | `xcats=yes`
xbinsize ybinsize | numeric | based on data | Explicitly specify bin size for continuous numeric data. If not specified these will be determined automatically, at some cost in performance. | `ybinsize=2.5`

cutofflist

commalist of numerics

based on data

Explicitly specify the cutoffs for color breakdown. commalist is a comma-delimited list of numeric values, from large magnitude to small. If not specified a reasonable (but probably not ideal) breakdown of 6 color categories will be provided automatically, at some cost in performance. commalist cannot contain embedded spaces.

`cutofflist=50,40,30,15,1` (would produce color categories of 50+, 40-49, 30-39, 15-29, and 1-14).

colorlist | commalist of colors | `yellow,dullyellow, orange,red,lightpurple, purple` | Specify the colors to be used for cells. The first color in commalist will go to the highest magnitude category. There should be enough colors to cover all categories. commalist may not contain embedded spaces. | `colorlist=white,limegreen, green,teal,blue, purple,black`
zerocolor | color | `black` | The plotting area will be initialized to this color. | `zerocolor=gray(0.8)`
contentfield | datafield |  | If specified, indicates that instances are not to be counted, but instead, the value in this field will determine the color for a given cell. Thus with contentfield there can be no more than one data row for any cell position. | `contentfield=5 contentfield=fcount`
symbol | symboldetails |  | Specifies a data point symbol to be used instead of the usual rectangle. `style=filled` is assumed, and there's no need to specify color. | `"symbol= shape=diamond radius=0.1"`
outline | `yes` or `linedetails` |  | If specified, cells will be outlined. `yes` gives a standard black line. | `"outline= color=gray(0.7) width=3"`

data display engine
Copyright Steve Grubb

Markup created by unroff 1.0, `` `` August 23, 2005.