I am not able to find correct frequency when I increase the sweeping frequency from 50 to 100. Why is that?

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Abrar Nur-E 2023 年 12 月 4 日

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https://jp.mathworks.com/matlabcentral/answers/2056119-i-am-not-able-to-find-correct-frequency-when-i-increase-the-sweeping-frequency-from-50-to-100-why-i

Hello, I am providing you the codes I am having issue with. The problem is when I am using the sweeping frequency as 50 Hz, the fft is showing perfect peaks at 62 and 66 kHz. But if I sweep the frequency at 100 Hz, its showing its peak a 61.9992 kHz. I am not sure the reason why? I am providing the code here. Also the image is also provided. You can only run the first for loop and the problem wil appear.