On 2018-04-30 10:25, João Pais wrote: > Hi William, > > >> Hi Joao, you need to find the peak amplitude, max(abs(x)), and divide >> all samples by that. > > I'm not sure: if I use the amplitudes 1 0.5 0.25, the peak amplitude is > 1, and the wave is clearly outside of the 1/-1 boundaries.
then you are doing something wrong. why do you think the maximum of abs(sin(t)+½sin(2t)+¼sin(4t)) is "1"? to analytically get the maxima of this function, you probably have to recall your high-school maths (get the derivative of the function (without the abs()), set it to "0" and solve it for every t to find the positions of the extrema; use these t's to get the values of the extrema) > Basically what I'm trying to do is to find out what is the formula that > does the "normalize" function. however, the "formula" of "normalize is very simple: - take a table - iterate over all the elements of the table and get the maximum value (absolute) you find in there - iterate over all the elements of the table and divide each element by the just found maximum. gfmasdr IOhannes
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