MATLAB: Decrementing an Array

array

Hi,

I am new to Matlab and i am trying to decrement a simple array. I want every element to arrives at zero and no negative. The problem is once any element of the array arrives at zero the decrement stops, i have tried to use several combination but nothing works. It goes like this

n=[8 5 9 3 6 11]
if n~=0
n=n-1
end.

As soon as the the value '3' arrives at zero the decrement stops. I have also used "sum" but it didn't work either. For instance while sum~=0, do the decrement but it didn't work either. I know its a simple task but i am stuck.

Best Answer

Ds = cumsum([n;-ones(max(n),length(n))]);
Ds(Ds<0)=0

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while (N~=[0 0 0])

is valid syntax in MATLAB. The comparison would take place, giving a logical vector. When an "if" or "while" is asked to make a decision about a logical vector or array, it considers it to be true if and only if all of the elements of the vector or array are non-zero (true).

It is well-defined behavior, but if you think about it, the loop would stop as soon as one or more of the elements of N became 0.

You may instead wish to use

while any(N~=[0 0 0])

which could be rewritten

while any(N~=0)

Best Answer

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