Error when appending object to empty array

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Liyuan
Liyuan on 2 May 2019
Edited: Liyuan on 2 May 2019
I am trying to form an array of a particular type of object, specifically the output model from fitdiscr, ClassificationDiscriminant.
Right now I am trying to do the following way:
model_cache = []
for i = 1:10
model = fitdiscr(...)
model_cache = [model_cache; model];
end
But this gives me the error
Undefined function 'throwNoCatError' for input arguments
of type 'double'.
Error in
classreg.learning.internal.DisallowVectorOps/vertcat
(line 49)
function a = vertcat(this,varargin),
throwNoCatError(this); end
Error in main_crossvalidate_sessions (line 84)
model_cache = [model_cache;model];
Which in plain english means I cannot concatenate a double with an object ([] is a double). How do I solve this issue? The way I can think of is ugly - when i = 1, model_cache = [model]; then in subsequent iterations append as usual. Are there simple solutions?
  1 Comment
Liyuan
Liyuan on 2 May 2019
Seems possible to do with cells, but I'm still curious, is there any way to do this with arrays, like an array of structures?

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