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How to define array without size and append values

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NoYeah
NoYeah 2020년 4월 14일
댓글: NoYeah 2020년 4월 14일
in C++, by using the vector API
we can create empty array and append values.
//for C++
vector<float> v;
v.push_back(2.3);
v.push_back(3.1);
v.push_back(4.5);
then we got
v[0]=2.3
v[1]=3.1
v[2]=4.5
How to implement that in Mathlab?
I have read the tutorial but it said the limited dimension is required when I want to create empty array
like
Array = int16.empty(5,0)

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Walter Roberson
Walter Roberson 2020년 4월 14일
Array = [];
Array(end+1,1) = 2.3;
Array(end+1,1) = 3.1;
Array(end+1,1) = 4.5;
Caution: this is not as efficient as if you can pre-allocate. Every time you add on to the end, MATLAB has to create a new internal version of the array with one more slot in it, and copy the values from the old array to the new array and put on the new value. MATLAB is weak on growing-in-place

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