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why following error is appearing when i use other image

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Komal Gaikwad
Komal Gaikwad 2018년 4월 3일
댓글: Komal Gaikwad 2018년 4월 9일
Error using vertcat Dimensions of matrices being concatenated are not consistent.
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Walter Roberson
Walter Roberson 2018년 4월 8일
Theoretically you can say nothing without more information.
If all you want is to lower the variance then divide the signal by 2 relative to its mean. Lower variance does not mean better signal: it can mean signal of smaller amplitude or it can mean signal that has had information removed. It is even possible to lower variance while increasing noise.
Suppose you were to take a sine wave of a number of cycles, no noise beyond problems with quantization of signals to finite representation. Now randomize the order of the samples. Clearly the result would be noise, and yet it would have the exact same variance. Variance alone cannot tell you how noisy a signal is.
Komal Gaikwad
Komal Gaikwad 2018년 4월 9일
ok sir thnx

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