1、打开桌面软件,进入操作页面。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/f11f3a292df5e0fee173ad59536034a85edf727a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、如下图,Long Name:名称;Units:单位;Comments:注释。把数据填入表格。如本文中A(X)列为电流,B(X)列为光强度。研究的规律就是随着电流的增加,光强度是如何变化的。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/d788d43f8794a4c2cc02c37301f41bd5ad6e3940?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、按住鼠标左键拖动选中这两列数据,然后点击Scatter,就出现如下的散点图。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/72f082025aafa40f9a93ea85a464034f78f01914?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、选中Analysis→Fit Polynomial→Open Dialog。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/dbb44aed2e738bd442629669ae8b87d6277ff923?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
5、弹出Polynomial Fit对话框,无需更改,直接单击OK按钮就可以了。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/a50f4bfbfbedab64d7526998f836afc379311e41?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
6、最终获得的一元二次方程为:y=7.08929+0.11904x+2.96429x²,其中拟合度高达0.9920。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/4a36acaf2edda3cc2db895780ee93901213f920d?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)