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Efficient way to count the number of times a value changes to a particular value in an array

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Afzal Ali
Afzal Ali 2017-12-3
回答： the cyclist 2017-12-3
What is the best way to do the following:
count=0;
for i=2:length(x)
if x(i)==1 && x(i-1)~=1
count=count+1;
end
end

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the cyclist
the cyclist 2017-12-3
sum(x(2:end)==1 & x(1:end-1)~=1)

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