<img src="http://img.jishulink.com/upload/201611/1479967475077_QQ图片20161124140354.png@!jslnk" title="QQ图片20161124140354.png" alt="QQ图片20161124140

我也没你的数据，就用我的自己的模型给你演示一下，步骤如下<img src="http://img.jishulink.com/upload/201611/1479994247121_blob.png" title="blob.png" style="max-width:760px;" alt="blob.png"/><img src="http://img.jishulink.com/upload/201611/1479994256050_blob.png" title="blob.png" style="max-width:760px;" alt="blob.png"/><img src="http://img.jishulink.com/upload/201611/1479994270429_blob.png" title="blob.png" style="max-width:760px;" alt="blob.png"/> <img src="http://img.jishulink.com/upload/201611/1479994289484_blob.png" title="blob.png" style="max-width:760px;" alt="blob.png"/> <img src="http://img.jishulink.com/upload/201611/1479994317786_blob.png" title="blob.png" style="max-width:760px;" alt="blob.png"/> 最后点击plot expression