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setdiffFS

setdiffFS finds the positive integers in a which are not present in the positive integers in b

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Syntax

Description

example

c =setdiffFS(a, b) Example of use of setdiffFS.

Examples

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  • Example of use of setdiffFS.

    • Define two vectors (containing positive integers) with values in common. 

    A = [3 6 2 1 5 1 1]; 
    B = [2 4 6];
    C=setdiffFS(A,B);
    disp(C);
         1
     3
     5

    Related Examples

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  • Time comparison with setdiff.

    • 20000 calls to setdiff and to setdiffFS. 

    % Analysis of computational time.
    n=100;
    nsimul=20000;
    tSETDIFF=0;
    tSETDIFFFS=0;
    for j=1:nsimul
    a=randi(n,[300,1]);
    b=randi(n,[40,1]);
    tsetdiff = tic;
    c=setdiff(a,b);
    tSETDIFF = tSETDIFF + toc(tsetdiff);
    tsetdiffFS = tic;
    cFS=setdiffFS(a,b);
    tSETDIFFFS = tSETDIFFFS + toc(tsetdiffFS);
    if ~isequal(c,cFS)
    error('FSDA:setdiffFS:WrongOutput','c and cFS are different')
    end
    end
    disp(array2table([tSETDIFF tSETDIFFFS],'VariableNames',{'setdiff time' 'setdiffFS time'}))

    Input Arguments

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    a — vector containing positive integer elements. Vector.

    A vector of length na containing positive integer numbers.

    Data Types: single| double

    b — vector containing positive integer elements. Vector.

    A vector of length nb containing positive integer numbers.

    Data Types: single| double

    Output Arguments

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    c —Positive integer elements thare are on a but not in b. vector

    Column vector.

    Note that the elements of c contain no repetitions and are sorted.

    References

    Riani, M., Perrotta, D. and Cerioli, A. (2015), The Forward Search for Very Large Datasets, "Journal of Statistical Software"

    See Also

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