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Преобразование проанализированного HTML-дерева в строку

    Описание

    пример

    str = string(tree) преобразует htmlTree объект tree в строку.

    Совет

    Используйте string функция, помогающая проверить базовый HTML-код htmlTree объекты. Навигация по элементам htmlTree объекты, используйте findElement функция.

    Примеры

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    Считывание HTML-кода с URL-адреса https://www.mathworks.com/help/textanalytics с использованием webread функция.

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

    Разбор кода HTML с помощью htmlTree функция.

    tree = htmlTree(code);

    Поиск всех абзацев в дереве HTML с помощью findElement функция. Абзацы представляют собой узлы с именем элемента «P».

    subtrees = findElement(tree,"P");

    Преобразование поддеревьев в строку с помощью string функция.

    str = string(subtrees)
    str = 26×1 string
        "<P class="h1">↵  <A href="../index.html" class="coming_from_product">Documentation</A>↵  <A href="../index.html" class="not_coming_from_product">Help Center</A>↵</P>"
        "<P>Text Analytics Toolbox™ provides algorithms and visualizations for preprocessing, analyzing, and modeling text data. Models created with the toolbox can be used in applications such as sentiment analysis, predictive maintenance, and topic modeling.</P>"
        "<P>Text Analytics Toolbox includes tools for processing raw text from sources such as equipment logs, news feeds, surveys, operator reports, and social media. You can extract text from popular file formats, preprocess raw text, extract individual words, convert text into numerical representations, and build statistical models.</P>"
        "<P>Using machine learning techniques such as LSA, LDA, and word embeddings, you can find clusters and create features from high-dimensional text datasets. Features created with Text Analytics Toolbox can be combined with features from other data sources to build machine learning models that take advantage of textual, numeric, and other types of data.</P>"
        "<P class="category_desc">Learn the basics of Text Analytics Toolbox</P>"
        "<P class="category_desc">Import text data into MATLAB<SUP>®</SUP> and preprocess it for analysis</P>"
        "<P class="category_desc">Develop predictive models using topic models and word embeddings</P>"
        "<P class="category_desc">Visualize text data and models using word clouds and text scatter plots</P>"
        "<P class="category_desc">Information on language support in Text Analytics Toolbox</P>"
        "<P>You clicked a link that corresponds to this MATLAB command:</P>"
        "<P>Run the command by entering it in the MATLAB Command Window. Web browsers do not support MATLAB commands.</P>"
        "<P>Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: <STRONG class="recommended-country"/>.</P>"
        "<P>You can also select a web site from the following list:</P>"
        "<P>Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.</P>"
        "<P class="text-center">↵  <A href="#" class="worldwide_link">Contact your local office</A>↵</P>"
        "<P class="ff_section_title">Explore Products</P>"
        "<P class="ff_section_title">Try or Buy</P>"
        "<P class="ff_section_title">Learn to Use</P>"
        "<P class="ff_section_title">Get Support</P>"
        "<P class="ff_section_title">About <SPAN translate="no">MathWorks</SPAN></P>"
        "<P class="h4 add_font_futura_medium add_margin_0">↵  <SPAN translate="no">MathWorks</SPAN>↵</P>"
        "<P>↵  <EM>Accelerating the pace of engineering and science</EM>↵</P>"
        "<P><SPAN translate="no">MathWorks</SPAN> is the leading developer of mathematical computing software for engineers and scientists.</P>"
        "<P>↵  <A href="/discovery.html?s_tid=all_disc_mw_ff">Discover...</A>↵</P>"
        "<P class="copyright" translate="no">© 1994-2021 The MathWorks, Inc.</P>"
        "<P>↵  <EM>Join the conversation</EM>↵</P>"
    
    

    Входные аргументы

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    HTML-дерево, указанное как htmlTree массив.

    Выходные аргументы

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    Строка, возвращаемая в виде массива строк с тем же размером, что и tree.

    Вопросы совместимости

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    В R2021a изменилось поведение

    В R2021a изменилось поведение

    Представлен в R2018b