ismissing

Find HTML trees without values

Syntax

tf = ismissing(tree)

Description

tf = ismissing(tree) returns a logical array that indicates which elements of tree do not reference HTML trees. For example, if tree is given by the Parent property of a root node, then the function returns 1 (true).

Examples

Test If HTML Tree Is Root Node

To test if an HTML tree object represents a root node, test that the Parent property is missing.

Read HTML code from the URL https://www.mathworks.com/help/textanalytics using webread.

url = "https://www.mathworks.com/help/textanalytics";
code = webread(url);

Parse the HTML code using htmlTree.

tree = htmlTree(code);

Test if the parent of tree references an HTML tree.

tf = ismissing(tree.Parent)

tf = logical
   1

Since tree represents the root node of the HTML tree, the value of tree.Parent is missing and the ismissing function returns 1 (true).

Input Arguments

tree — HTML tree

htmlTree array

HTML tree, specified as an htmlTree array.

Version History

Introduced in R2018b