Stream Ribbon Issues

Hello, I'm using the streamribbons function in my roller coaster design class. I've gotten a program to work and graph a full curve with a very small "rot" (rotation angle) but when i calculate an angle and put it in the code instead it only graphs half of the curve.

The curve values are a 198x3 double and the rotation angle is a 198x1. If anyone has experienced this before, please let me know.

% ---variables and step size---

u=-1:.01:1;

A =20; B=20; C=20;

D =10; E=0; F=10; 

% ---Calculate Vertical---

vertical =[A*mfun('T',7,u)' B*mfun('T',5,u)'  C*mfun('T',3,u)'];

verticaldat = [A*mfun('T',7,u)' B*mfun('T',5,u)'  C*mfun('T',3,u)'];

verticaldat2 = verticaldat(1:198,:);

% ---Calculate Rotation---

Vo = 90;

rot = slopenumeric(verticaldat,Vo); % program i wrote to calculate theta

rotl = length(rot);                            % based upon the initial speed to  

rot = {rot'};                                      %produce an even normal force

% --- Adjust Vertical size---

vertical1 = vertical(1:rotl,:); % changes size

vertical = {[vertical1(:,1) vertical1(:,2) vertical(:,3)]};

% ---Plot graph---

A1 =streamribbon(vertical,rot,1);

set(A1,'FaceColor','r',...

  'EdgeColor',[.7 .7 .7],...

  'AmbientStrength',.6)

hold on

plot3(verticaldat(:,1),verticaldat(:,2),verticaldat(:,3))

[Bryan]

Never mind, I figured it out. My rotation had two Nan's in the middle of the code preventing it from continuing.