How to export data from a for loop without overwriting the data?

I want to create a table with all of the x, y, and z coordinates and additionally all of the x2,y2,and z2 coordinates. Does anyone know how to do this so that the values don't overwrite within each for loop? My code is below...

clc;
clear variables;
close all;

n = input('number of revolutions '); 
r = input('radius of stent ');
a = input('angle with respect to the upwards horizontal in degrees '); 
w = input('number of wires ');
R = input('radius of wire ');

h=(2*n*pi*r)/tand(90-a); %height of stent determined by other inputs
e = (2*pi)/(w/2); %theta (spacing between where each wire starts)
if mod(w,2) ==0 %number of wires is even
else
  fprintf('ERROR:number of wires must be even'); %stops code if wire number is odd
  return
end
if mod(n,1) ==0 %number of revolutions is whole number
else
  fprintf('ERROR:number of revolutions must be whole number'); 
  return
end

for i=1:w/2
  d=1;
  for t=(i-1)*e:2*pi/w:(n*2*pi)+e*(i-1)
    d=d+1;
    if mod(d,2)==0
      x=(r+R)*sin(t); 
      y=(r+R)*cos(t); 
      z=(h/(n*2*pi))*(t-((i-1)*e));
      plot3(x,y,z,'.','MarkerSize',25,'MarkerFaceColor','black','MarkerEdgeColor','black')
      hold on
    else 
      x=(r-R)*sin(t); 
      y=(r-R)*cos(t); 
      z=(h/(n*2*pi))*(t-((i-1)*e));
      plot3(x,y,z,'.','MarkerSize',25,'MarkerFaceColor','black','MarkerEdgeColor','black')
      hold on
    end
    hold on
  end
  hold on
end

for i=1:w/2
  k=1;
  for t2=(n*2*pi)+(e*(i-1)):-2*pi/w:(i-1)*e
    k=k+1;
    if mod(k,2)==0
      x2=(r-R)*sin(t2); 
      y2=(r-R)*cos(t2); 
      z2=(h/(n*2*pi))*(t2-((i-1)*e));
      plot3(x2,y2,z2,'.','MarkerSize',25,'MarkerFaceColor','red','MarkerEdgeColor','red')
      hold on
    else 
      x2=(r+R)*sin(t2); 
      y2=(r+R)*cos(t2); 
      z2=(h/(n*2*pi))*(t2-((i-1)*e));
      plot3(x2,y2,z2,'.','MarkerSize',25,'MarkerFaceColor','red','MarkerEdgeColor','red')
      hold on
    end
    hold on
  end
  hold on
end

[Julia Morandi]

n=2, r=12, a=23, w=12, R=1

Answer 1

[jonas]

You need to save the next entry as a new index:

out(ind)=1;

If you have steadily increasing i, then you can just write

for i=1:2
  out(i)=1;
end

If you are looping over something less convenient, you can use a counter

counter=1;
for i=1.5:0.5:2.5
  out(counter)=1;
  counter=counter+1;
end

[dpb]

Remember to preallocate the arrays being saved...