Cannot get cscvn (from spline library)function to work

Hi,

I am trying to interpolate a curve using CSCVN function (from spline library). I think it is because the way I store the coordinate in my array. When I run the program, it shows all the coordinates location from the for loop, but not the interpolated curve. In case the problem my software, I tried a premade matlab code that uses cscvn function and it works...

for y=-yl2:b:0;

i = i + 1 ;
x = ((-(r)/(r+l2))*y);

z = sqrt(r.^2-x.^2);

table1_step1 = [x ; y ; z];

table1_step1_print(i, : , :)= table1_step1;
end

fnplt(cscvn(table2_step1_print(:,1),table2_step1_print(:,2), table2_step1_print(:,3)));