在数据可视化中,很多时候需要对某一区间的数据进行局部放大,以获得对比度更高的可视化效果。下面利用 MATLAB 语言实现一个交互式的局部放大图绘制。
源码自行下载:

使用方法

zp = BaseZoom();  % 添加 1 个放大区域
zp.plot;

如果要绘制多个放大区域,比如3个,则输入以下代码:

% 添加 3 个放大区域
zp = BaseZoom();
zp.plot;
zp.plot;
zp.plot;

Matlab交互式的局部放大图-LMLPHP
绘图配置参数的自定义
ZoomPlot 的绘图配置参数存储在 parameters.json 中,默认值为:

{
    "subAxes": 
        {
            "Color": "none",
            "LineWidth": 1.2,
            "XGrid": "off",
            "YGrid": "off",
            "ZGrid": "off",
            "GridAlpha": 0.15,
            "GridColor": [0.15, 0.15, 0.15],
            "GridLineStyle": "-",
            "Box": "on",
            "TickDir": "in",
            "Comments": "theme of the sub axes"
        },

    "zoomedArea": 
        {
            "Color": "k",
            "FaceColor": "none",
            "FaceAlpha": 0,
            "LineStyle": "-",
            "LineWidth": 1.5,
            "Comments": "theme of the zoomed area"
        },

     "dynamicRect": 
        {
            "LineColor": [0, 0.4471, 0.7412],
            "LineWidth": 2,
            "Marker": "s",
            "MarkerSize": 9,
            "FaceColor": [0, 0.4471, 0.7412],
            "FaceAspect": 0.3,
            "EdgeColor": "k",
            "Comments": "theme of the zoomed area"
        },

     "connection": 
        {
            "LineColor": "k",
            "LineWidth": 1.5,
            "LineStyle": ":",
            "StartHeadStyle": "ellipse",
            "StartHeadLength": 3,
            "StartHeadWidth": 3,
            "EndHeadStyle": "cback2",
            "EndHeadLength": 7,
            "EndHeadWidth": 7,
            "Comments": "theme of the zoomed area"
        }

}

可以看到,一共有四个部分的配置参数:

1.subAxes(子坐标系)
2.zoomedArea(放大区域)
3.dynamicRect(调整过程中的动态矩形)
4.connection(子坐标系和放大区域的连接线)

资料来源于知乎大佬@iqiukp !

01-20 19:09