Determining the difference between two vectors

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.

Answer 1

[Paulo Silva]

numel(find(td~=rd))

Answer 2

[Matt Fig]

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.

[Paulo Silva]

simple code :) +1 vote

[Anu Shivalinga]

Hello, this works perfect. Thanks. But what if sizes of 2 arrays are not equal? How to find the mismatch between those?

Answer 3

[Paulo Silva]

yet another way

sum((td & rd | (~td & ~rd))==0)

even more simple

sum(~((td & rd | (~td & ~rd))))

even better

sum(xor(td,rd))

Answer 4

[osman yurdakul]

thanks for all helps it's working properly now thanks again ...