DATASETS

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LEAF BACKGROUND COLOR

Table of contents

• overview
• modifiers
• data
• examples
• add leaf background color to a collapsed tree

Overview

leafbackground colors will change the colors of leaf background. Similar to branch colors, multiple datasets can be uploaded to a tree, but only one can be shown at a time.

Here is an example:

Supported modifiers

Supported Key-Value pairs for leaf colors:

Key (case insensitive)	Value	Description
!Groups or !LegendText	comma separated text	Legend texts; for example 'group_a,group_b,group_c'
!LegendStyle or !Style	rect or circle or star	shapes to be plotted before the legend texts; default = rect
!LegendColors or !Colors	comma separated color codes or names	colors to be applied to the shapes specified by LegendStyle; for example 'red,green,yellow' ; note the number of colors should match the number of legend fields
!Title or !Legend	text	title of the legend; default = name of the dataset
!ShowLegends	0 or 1	0 : hide legends; 1 : show legends
!opacity	float number between 0 to 1	opacity of the dataset

Data

Data are usually tab-delimited three-column texts, with the third column optional. Let me use the tree below to illustrate the usage of the data:

(chicken,((mouse,rat),(chimp,human)));

• first column: the location the first column dictates where the data to be plotted. It usually contains the name of a leaf node, or two leaf names separated by a ','.
• one single leaf name dictates that the data will be plotted on / next to / under the leaf or the branch connecting directly to the leaf node
• two leaf names are often used in combination with an 'ad' at the third column; see the section 'third column' for more details.

For example:

chicken
mouse,human

• second column: color to be applied

For example:

chicken	green
mouse,human	blue

• third column: optional commands to change the default behavior of current line By default, the color will only apply to the specified leaf label; for example:

## leaf background color
mouse	red

By adding a third column, the default behavior can be changed. Here is a list of choices of this column:

Option (case insensitive)	Description
ad	apply color to the leaf labels of all descendants
prefix	apply color to all leaf labels that start with the string specified by the first column
suffix	apply color to all leaf labels that end with the string specified by the first column
anywhere	apply color to leaf labels that contain the string specified by the first column

See examples below.

Examples

Example 1, 'ad':

## leaf background color
human,mouse	lightblue	ad

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Example 2, 'prefix':

## leaf background color
mouse,human	grey	ad
ch	yellow	prefix

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Example 3, 'suffix':

## leaf background color
chicken,human	grey	ad
n	blue	suffix

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Add leaf background color to a collapsed tree

Evolview supports collapsing at internal nodes; collapsed nodes are treated as leaf nodes. It is therefore very straightforward to add leaf background color to a collapsed tree. See here for more information.