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%% Information on a Lowpass FIR Filter % Design a lowpass FIR filter with normalized passband frequency $0.4\pi$ % rad/sample and normalized stopband frequency $0.45\pi$ rad/sample. Obtain % information about the filter just designed. % Copyright 2015 The MathWorks, Inc. %% d = designfilt('lowpassfir','PassbandFrequency',0.4,'StopbandFrequency',0.45); s = info(d)