How to replace the for loop in the following matlab code with built-in functions?

m=cell(20，5)for = 0.7； 0. 1:2 forb = 0. 1:0. 1:0.8 forz = 0. 1:0. 1:0.7 forx = 8:2:20f = 0，fn = 0 forn = 1:(x/2- 1)f = 1000。 /(x/2- 1)。 *(0.7-z)。 /((z-0.7)。 *(sqrt(a^2-b^2-4.*a.*sqrt(0. 16-b^2/4)- 1.32)./ 1.96)-(sqrt(0. 16-b^2/4))+(sqrt(0. 16-(n.*b./x)^2)))fn=fn+fendiffn==0i=i+ 1m{i, 1}=a； %m instead of cellm {i,2} = b; m{i，3 } = z； m{i，4 } = x； m{i，5 } = fnendendendendendm