Function not returning the desired structure

When testing my function to build a structure based on a .dat file, the output shows the desired struct 'kepler' but seems to overwrite with the same size struct 'ans.' Why is it doing this, and how can I fix it?

 function kepler = loadkepler(filename)
 
    data = load(filename);
 
    kepler.svid = data(1:end,1);
    kepler.meananomaly = data(1:end,2);
    kepler.omega = data(1:end,3);
    kepler.radius = data(1:end,4);
    kepler.inclination = data(1:end,5);
    kepler.reftime = data(1:end,6);
 end
 
 

When I test it with just the 'svid' field, this is the output:

 >> loadkepler
kepler = 
  struct with fields:

    svid: [24×1 double]
ans = 
  struct with fields:

    svid: [24×1 double]

Attempts to build a bar graph only work if I use 'ans.svid' instead of 'kepler.svid'

Answer 1

[Stephan]

You dont assign the output of the function to a variable - use:

kepler = loadkepler...

[David Meixell]

Well, that worked!

I thought I wouldn't have to do that, as the struct 'kepler' is created when I assign each field. Does MATLAB not recognize the struct as a valid output of the function? I'm confused as to what's going on behind the scenes.