基于非計算機(jī)專業(yè)人員的計算機(jī)應(yīng)用能力稍差，而又要經(jīng)常使用受試者工作特征（ROC）曲線作為判斷的評價方法，介紹了ROC曲線的概念、原理和優(yōu)點(diǎn)，以及如何在MATLAB下繪制ROC曲線。以評價分離信號與噪聲數(shù)據(jù)為例，分別采用兩種方法來繪制ROC曲線。一是基于ROC基本概念和Excel的計算功能，分別取不同的閾值得到相應(yīng)的敏感度和特異度，然后繪制出ROC曲線；二是依據(jù)MATLAB工具下的直方圖和ROC的概念，編程完成繪制ROC曲線。第一種方法容易理解、簡單，但是必須要多次打開Excel才能完成選擇不同閾值得到多組敏感度和特異度的目的；第二種方法應(yīng)用MATLAB軟件編寫程序，程序短小、簡單，易使用，而且可隨意設(shè)置修改閾值，得到相應(yīng)的敏感度和特異度以及繪制出ROC曲線。

Abstract:

?Based on non-computer professionals with poor ability of using computer，but frequently used ROC curve as the evaluation method， this paper introduced the concepts，principles and advantages of the ROC curve，and how to draw a ROC curve with MATLAB software. As an example of evaluating separate signal and noise data，two methods were used to draw the ROC curve. First，based on the basic concepts of ROC and Excel tools，it got the corresponding sensitivity and specificity at a different threshold，then draw the ROC curve. Second，based on histograms of MATLAB and concepts of ROC curve，it programed to draw the ROC curve. So the first method was simple and easy to understand，but it must to open Excel repeatedly for choosing different thresholds to get multiple sensitivity and specificity. The second method applied MATLAB software to program，the program was short，simple and easy to use，and also modified the threshold value getting the corresponding sensitivity and specificity，as well as drawing the ROC curve.