Determining the difference between two vectors

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osman yurdakul
osman yurdakul 2011-3-24
评论： Anu Shivalinga 2022-7-29
hello friends,
i have to find error between 2 array. i sent a data from transmitter to receiver.
data transmitted is;
td = [1 1 1 0 0 0 1 1 0 1 0 1 1 0 0];
and the data received is;
rd = [0 1 1 0 1 0 1 1 0 1 0 1 1 0 1];
and the number of error is 3 as it is seen above
but how can i find the error number by matlab code?..
Thanks for your helps.

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采纳的回答

Paulo Silva
Paulo Silva 2011-3-24
numel(find(td~=rd))

更多回答（3 个）

Matt Fig
Matt Fig 2011-3-24
Expanding on Paulo's answer, to get the logical index locations of the errors, do this:
locs = td~=rd
now to find out how many there are, I would use
errornumber = sum(locs) % Or just sum(td~=rd) if locs not needed.
If you need the linear index number of the errors, then use FIND, as Paulo shows.
  2 个评论
Anu Shivalinga
Anu Shivalinga 2022-7-29
Hello, this works perfect. Thanks. But what if sizes of 2 arrays are not equal? How to find the mismatch between those?

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Paulo Silva
Paulo Silva 2011-3-24
yet another way
sum((td & rd | (~td & ~rd))==0)
even more simple
sum(~((td & rd | (~td & ~rd))))
even better
sum(xor(td,rd))
osman yurdakul
osman yurdakul 2011-3-24
thanks for all helps it's working properly now thanks again ...

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