hello sir i want to plot digram for SNR Vs false negative and positive ..

i am confused how to write matlab code for false negative and false positive can anyone provide me the matlab code for false negative and false positive that i can understand it and use for my future work ..

i plot a SNR Vs RATE but it seems wrong to me so i am using this platform that someone help me because when i ask question you give me right answer i am very thankful of your help ..