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+//EXAMPLE 9.1
+//pass band & stop band ripple
+clc;
+clear;
+ap=0.1;//peak passband ripple in dB
+as=35;//min. stopband attenuation in dB
+
+//calculation of peak ripple values
+dp=1-10^-(ap/20);
+disp(dp,'dp = ');
+ds=10^-(as/20);
+disp(ds,'ds = ');