2.2.3.9.1 matrixbase::AllNonZero

AllNonZero

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include

Description

Indicates whether or not an entire row or column of this matrix is comprised of all non-zero elements.

Syntax

int AllNonZero( vector<BOOL> & vAllNonZero, int nDim = 1, double dTol = DEFAULT_TOLERANCE )

Parameters

vAllNonZero: [output] The result vector
nDim: [input] The AllNonZero test can occur row wise (relative to the first dimension when nDim=1) or column wise (relative to the second dimension when nDim=2)
dTol: [input] The tolerance used to decide whether or not an element is zero (if abs(element) < dTol then the element is considered to be zero)

Return

Returns 0 on success and a non-zero error code on failure.

Examples

EX1

//to indicate whether or not each row or column of this matrix is comprised of all non-zero elements
void matrixbase_AllNonZero_ex1()
{
 
    vector<BOOL> vRowIsAllNonZeros, vColIsAllNonZeros;
 
    matrix<double> mat1 = {
        {1, 1, 1, 0.001},
        {1, 1, 0, 0},
        {1, 0, 0, 0}
    };
 
    int rc; 
    // to indicate whether or not each column of this matrix is comprised of all non-zero elements
    rc=mat1.AllNonZero(vRowIsAllNonZeros); 
    if(rc!=0) 
        printf("  AllNonZero failed. Error Code=%d\n",rc);
    else{ 
    	for(int n = 0 ; n<vRowIsAllNonZeros.GetSize(); n++)
        	printf("%d ",vRowIsAllNonZeros[n]);
			// The result is 1 0 0 0.
        printf("\n");
    }
 
    // to indicate whether or not each row of this matrix is comprised of all non-zero elements
    rc=mat1.AllNonZero(vColIsAllNonZeros,2);
    if(rc!=0) 
        printf("  AllNonZero failed. Error Code=%d\n",rc);
    else{ 
        for(int n = 0 ; n<vColIsAllNonZeros.GetSize(); n++)
        	printf("%d ",vColIsAllNonZeros[n]);
			// The result is 1 0 0.
        printf("\n");
    }
    
    //if abs(element) < dTol then the element is considered to be zero
    rc=mat1.AllNonZero(vColIsAllNonZeros, 2, 0.01);
    if(rc!=0) 
        printf("  AllNonZero failed. Error Code=%d\n",rc);
    else{ 
        for(int n = 0 ; n<vColIsAllNonZeros.GetSize(); n++)
        	printf("%d ",vColIsAllNonZeros[n]);
			// The result is 0 0 0.
        printf("\n");
    }
}

EX2

// Determin if all cell(s) in each matrix column (or row) are non-zeros.
void matrixbase_AllNonZero_ex2()
{
    PageBase pgbase;
    int rc, ii, jj;
 
    vector<BOOL> vRowIsAllNonZeros;
 
    matrix<double> mat1 = {
        {1, 1, 0,  1,  1,  0, 99},
        {1, 1, 0,  1, 99, 99, 99},
        {1, 0, 0, 99, 99, 99, 99}
    };
    for(ii=0; ii<3; ii++)
        for(jj=0; jj<7; jj++) 
            if(mat1[ii][jj]==99)
                mat1[ii][jj]=NANUM;  // set row=ii,col=jj to NANUM
    // Input matrix:
    // {1, 1, 0,  1,  1,  0, --},
    // {1, 1, 0,  1, --, --, --},
    // {1, 0, 0, --, --, --, --}
 
    String MatWinName,MatLyName;
 
    MatrixPage MatPg1; 
    MatPg1.Create("Origin");
    MatWinName=MatPg1.GetName();
    MatrixLayer MatLy1 = MatPg1.Layers(0);
    MatLyName=MatLy1.GetName();
    Matrix Mat1(MatLy1);
    pgbase = Project.Pages(); // Get the active page
    pgbase.Rename("Original");
    printf("%s matrix is created.\n",Mat1.GetName());
    Mat1=mat1;
 
    rc=mat1.AllNonZero(vRowIsAllNonZeros);
    if(rc!=0) 
		printf("  AllNonZero failed. Error Code=%d\n",rc);
    else{            
		MatrixPage MatPg2;
        MatPg2.Create("Origin");
        MatrixLayer MatLy2 = MatPg2.Layers(0);
        Matrix Mat2(MatLy2);
        pgbase = Project.Pages(); // Get the active page
        pgbase.Rename("AllNonZero");
 
        Mat2.SetSize(1,vRowIsAllNonZeros.GetSize());
        Mat2.SetRow(vRowIsAllNonZeros, 0);  // Set 1st Row(as the index starts 0) of Mat2
        printf("AllNonZero vector is placed in %s.\n",Mat2.GetName());
        printf("Note that ALL cells in the column should be non-zero and non-NANUM,\n");
    }
}

Remark

Indicates whether or not an entire row or column of this matrix is comprised of all non-zero elements. For matrices having an underlying base type of double or complex a specified tolerance is used to determine whether or not each element is zero.