How many four-digit positive integers are there with thousands digit

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• Subscript indices must either be real positive integers or logicals 头痛死了n_max=[30 25 22 23 21 20 19 17 16 12];n_min=[60 51 45 46 42 40 38 35 33 25];format longr=[3.2 3.49 3.64 3.75 3.84 3.91 4.02 4.14 4.34 4.97]*10^-3;su=[10000:10000:100000];sita=zeros(10,10)for i=1:10for j=1:10sita(i,j)=2*atan(((8*r(i)*su(j) + 9)^(1/2) - 1)/(4*r(i)*su(j) + 4));endend% oe=zeros(10,10);be=zeros(10,10);fbg=zeros(10,10);bqe=zeros(10,10);Asl=zeros(10,10);Asd=zeros(10,10);