charts - FLOT 中的对数图

Question

有谁知道如何在 FLOT 中创建对数图表？

基本上我正在尝试创建一个看起来像这里显示的图表(左上角):
http://leto.net/plot/examples/logarithms.html

但是，我尝试使用相同的选项，但它没有以相同的方式显示图表。考虑到这篇文章已经很老了，我认为从那时起 FLOT 肯定发生了很多变化。

如果有人有任何想法，请告诉我。

谢谢。

Answer 1

您可以使用 yaxis 上的“转换”选项来执行此操作。

查看作品 here .

$(function () {
    // setup plot
    function sampleFunction(x1, x2, func) {
        var d = [ ];
        var step = (x2-x1)/300;
        for (var i = x1; i < x2; i += step )
            d.push([i, func( i ) ]);

        return d;
    }

    var options1 = {
        lines: { show: true },
        xaxis: { ticks: 4 },
        yaxis: { ticks: [0.001,0.01,0.1,1,10,100],
                 transform: function(v) {return Math.log(v+0.0001); /*move away from zero*/},
                 tickDecimals: 3 },
        grid: { hoverable: true, clickable: true, color: "#999" }
    };

    var data1 = sampleFunction( 0, 5, function(x){ return Math.exp(x)*Math.sin(x)*Math.sin(x) } );

    var plot1 = $.plot($("#chart1"),  [ { label: "exp(x)sin(x)^2", data: data1 } ], options1);
});

完整的工作代码:

$(function () {
    // setup plot
    function sampleFunction(x1, x2, func) {
        var d = [ ];
        var step = (x2-x1)/300;
        for (var i = x1; i < x2; i += step )
            d.push([i, func( i ) ]);

        return d;
    }
    
    var options1 = {
        lines: { show: true  },
        xaxis: { ticks: 4 },
        yaxis: { ticks: [0.001,0.01,0.1,1,10,100],
                 transform:  function(v) {return Math.log(v+0.0001); /*move away from zero*/} , tickDecimals: 3 },
        grid: { hoverable: true, clickable: true , color: "#999"}
    };
    
    var data1 = sampleFunction( 0, 5, function(x){ return Math.exp(x)*Math.sin(x)*Math.sin(x) } );
    
    var plot1 = $.plot($("#chart1"),  [ { label: "exp(x)sin(x)^2", data: data1} ], options1);
    
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/flot/0.8.3/jquery.flot.min.js"></script>
<br/><br/>
<div id="chart1" style="width:600px;height:300px;"></div>