lt4_2_1.m

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%例题4.2.1
x=-15:5:25;
N1=[10    27    43    38    23     8     1     0];
N2=[ 0     7    17    30    29    15     1     1];
y1=xnzh(x,N1);
y2=xnzh(x,N2);
ksjy2(y1,y2,0.05);