1. Remove mean 1.1. Purpose Subtract the mean of a signal. 1.2. Description The mean \(\bar{x}\) is subtracted from a signal \(x=x(k)\), that is, \(x_\mathrm{zeromean}(k)=x(k)-\bar{x}.\) 1.3. Input Any equidistant signal (see Signal Types ). 1.4. Output Signals with zero mean.