Finds the local maxima, local noise and its associated standard deviations in a vector.
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a local miximum is defined as an element in a sequence which is greater than all other elements within a window of width ‘span’ centered at that element. The default value is 3, meaning that a peak is bigger than both of its neighbors. Local noise is definedas an element minus the mean of all elements within a window of width ‘span’ centered at that element. Local standard deviation of an element is defined as the standard deviation of all elements within a window of width ‘span’ centered at that element.
a logical vector of the same length as ‘series’ indicating where the peaks are.
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