The unique function and ismember function of MATLAB Foundation

(1) Unique function

function format:

b = Unique (a)% takes a vector of the non-repeating elements of set A;

B = Unique (A, ' rows ')% returns a, B matrix consisting of different line elements;

[B,i,j] = unique (...) % where I reflects the position of elements in B in the original vector (matrix A), J reflects the position of the original vector (matrix a) in B;

Code:

>> a=[1 2 3;4 5 6;7 8 9;1 2 3;5 5 5;6 6 6;6 7 8]a =     1     2     3     4     5     6     7     8     9     1
   
    2     3     5     5     5     6     6     6     6     7     8>> a1=unique (A, ' rows ') A1 =     1     2     3     4     5     6     5     5     5     6     6     6     6     7     8     7     8     
   

(2) IsMember

tf = IsMember (a,s)

tf = IsMember (a,s, ' rows ')

[TF, loc] = IsMember (a,s,...)

The A1 in the code is still the above A1 (the example here is about matrices)

The code is as follows:

>> a=[1 2 3]a =     1     2     3>> [Tfa,loca] = IsMember (a,a1, ' rows ') TFA =     1loca =     

The unique function and ismember function of MATLAB Foundation