change this program from its symbolic structure to a new one?

please help me this is program of Bspline plotter i want to change it .from line that u defined as symbolic i cant learned the program who can help me ?please help me?

clear,clc,format compact

    number_of_points=5
    p=[1 2 3;5 7 14;13 16 5;13 15 4;8 6 7];

    P=p'
    n = number_of_points - 1;
    clc
    k = 3

    periodic = 2
    while true
        if periodic == 1
            periodic = true;
            break;
        elseif periodic == 2
            periodic = false;
            break;
        elseif periodic == 3
            t = input('enter [t1,t2,...]: ');
            break;
        end
    end

if periodic for ii = 0:n+k t(ii+1) = ii - k; end else for ii = 0:n+k; if ii >= 0 && ii < k t(ii+1) = 0; elseif ii >= k && ii <= n t(ii+1) = ii - k + 1; elseif ii > n && ii <= n+k t(ii+1) = n - k + 2; end end end knots = t' u_min = t(k-1 + 1); u_max = t(n+1 + 1); nos = length(t)-1; N{1} = eye(nos); satr = nos - 1; syms u; for m = 2:k N{m} = sym(zeros(satr,nos)) for mm = 1:satr surat = [u - t(mm) t(mm+m) - u]; makhraj = [t(mm+m-1)-t(mm) t(mm+m) - t(mm + 1)]; if makhraj(1) == 0 surat(1) = 0; makhraj(1) = 1; end if makhraj(2) == 0 surat(2) = 0; makhraj(2) = 1; end % N{m}(mm,mm) = for mmm = 1:nos N{m}(mm,mmm) = (surat./makhraj)*N{m-1}(mm:mm+1,mmm); end

        N{m};
        (surat./makhraj);
    end
    satr = satr - 1;
end
N{m};
rang = {'r','b','g','m','y','k','c','r','b','g','m','y','k','c','r','b','g','m','y','k','c','r','b','g','m','y','k','c','r','b','g','m','y','k','c','r','b','g','m','y','k','c'};
matr = P*N{m};

for m = 1:nos x = linspace(t(m),t(m+1),100); for mm = 1:3 javx{mm,m} = x; if matr(mm,m)== 0 jav{mm,m} = 0*x; else for mmm = 1:length(x) u = x(mmm); jav{mm,m}(mmm) = eval(matr(mm,m)); end end end plot3(jav{1,m},jav{2,m},jav{3,m},'color',rang{m},'linewidth',3) hold on end plot3(P(1,:),P(2,:),P(3,:),'or-') text(mean(P(1,:)),mean(P(2,:)),mean(P(3,:)),'rotate, it''s 3d','fontsize',13,'fontname','Segoe UI light') rotate3d on box