lar category axis | radiuAxis: {min: 'dataMin', max: 'dataMax'}</h2>
        <div class="chart" id="main90.1"></div>

        <h2>polar category axis | radiuAxis: {min: function, max: function}</h2>
        <div class="chart" id="main90.2"></div>

        <h2>parallel category axis | parallelAxis: {min: undefined, max: undefined}</h2>
        <div class="chart" id="main91.1"></div>

        <h2>single category axis | singleAxis: {min: 'dataMin', max: 'dataMax'}</h2>
        <div class="chart" id="main92.1">