只有春节那么几天才能和家人团聚，看着爸爸妈妈一年比一年老，自己还是一无所有，照顾好自己尚且惭愧，真是悲从中来，又能怎么办呢，

唯有奋发努力，时不我待，多想想怎么赚钱，加油。

 

代码：

function [delta1, delta2] = db2delta(Rp, As)% -------------------------------------------------% Converts dB specs Rp and As into %   absolute specs delta1 and delta2%  [delta1, delta2] = delta2db(Rp, As)%  delta1 = passband tolerance ( or ripple), absolute specs%  delta2 = stopband tolerance ( or ripple), absolute specs %      Rp = passband ripple in dB%      As = stopband attenuation in dB%temp = 10^(-Rp/20);delta1 = (1-temp) / (1+temp);delta2 = (1+delta1)*(10^(-As/20));

　　

function [Rp, As] = delta2db(delta1, delta2)% -------------------------------------------------% Converts absolute specs delta1 and delta2 into %   dB specs Rp and As%  [Rp, As] = delta2db(delta1, delta2)%  delta1 = passband tolerance ( or ripple), absolute specs%  delta2 = stopband tolerance ( or ripple), absolute specs %      Rp = passband ripple in dB%      As = stopband attenuation in dB%Rp = -20 * log10( (1-delta1)/(1+delta1));As = -20 * log10( delta2 / (1+delta1));

　　运行结果：