Array of Objects as a Property of Class

I have created a custom class for handling ECG files. Originally I programmed it to handle (eg. filter, detrend etc.) the entire file at once.

I would now like to handle it segment by segment instead, and I thought I could do this by creating an array of ECG objetcs (one for each segment) as a property of the class as follows:

However when I try to run the segment method, I am told I cannot convert double to ECG.

How can I define an array of ECGs as the property instead of an array of doubles?

classdef ECG < handle
properties (SetAccess = private)   
    Segment {ismatrix}
end

methods
    function segmentECG(obj,varargin)          
        for i = 1:SegNum
            
            segSignal = obj.signal(i*SegLen : 2*i*SegLen-1);            
            obj.Segment(i) = ECG(segSignal,obj.Fs);
            
        end    
end
    

Answer 1

[Matt J]

classdef ECG < handle
properties (SetAccess = private)   
    Segment {ismatrix}
end

methods
    function segmentECG(obj,varargin)   
        
        c=cell(1,SegNum);
        
        for i = 1:SegNum
            
            segSignal = obj.signal(i*SegLen : 2*i*SegLen-1);            
            c{i} = ECG(segSignal,obj.Fs);
            
        end    
        
        obj.Segment=[c{:}];
        
end
    

[David OK]

Thank you very much!