Number of samples - how to calculate it?

Question

claudio 2016-5-12

0
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https://ww2.mathworks.cn/matlabcentral/answers/283982-number-of-samples-how-to-calculate-it

回答： dpb 2016-5-13

Hello everybody! I am writing a code to play DTMF tones, and need to play them for 0.5 seconds. My question is: how to calculate the number of samples [n]? I tried to apply fs/f0 but the result was a small range. I am using FS = 8000 Hz. Thank you!!!

fs = 8000; 
% Below I tried to use 5000 just for testing my code, and worked well:       
n = [0:5000];
tone0 = (1.5)*cos(0.73906*n)+(1.5)*cos(1.04929*n);