Description:  Construct a vector containing Blackman window weights.

Syntax: 

Requirements:  The parameter LEN must be greater than one.

Result:  Each element n, from 0 through LEN-1, of the result vector is

0.42 -
0.50 * cos(temp1 * n) +
0.08 * cos(temp2 * n)

where the float values temp1 is 2 * VSIP_IMPL_PI / (len - 1) and temp2 is 2 * temp1.

Example: 

Vector<float> Z;
Z = blackman(200);

See Also: 

Description:  Construct a vector containing Chebyshev window weights.

Syntax: 

Requirements:  The parameter LEN must be greater than one.

Result:  The function returns a vector of length LEN initialized with Dolph-Chebyshev window weights using the specified ripple.

Example: 

Vector<float> Z;
Z = cheby(200,0.5);

See Also: 

Syntax: 

    Vector<T> freqswap( Vector<T> A );
    Matrix<T> freqswap( Matrix<T> A );

Description: Swaps halves of a vector, or quadrants of a matrix, to remap zero frequencies from the origin to the middle.

Result: freqswap returns a new vector (matrix) with A's halves (quadrants) swapped.

Example: 

Vector<int> vec(4); 

vec(0) = 10; 
vec(1) = 11; 
vec(2) = 12; 
vec(3) = 13;

std::cout << freqswap(vec) << std::endl; // prints: 12 13 10 11

Description:  Construct a vector containing Hanning window weights.

Syntax: 

Requirements:  The parameter LEN must be greater than one.

Result:  Each element n, from 0 through LEN-1, of the result vector is

0.5 * (1 - (cos(temp * (n + 1))))

where the float value temp is 2 * VSIP_IMPL_PI / (len + 1).

Example: 

Vector<float> Z;
Z = hanning(200);

See Also: 

Description:  Construct a vector containing Kaiser window weights.

Syntax: 

Requirements:  The parameter LEN must be greater than one.

Result:  The function returns a vector initialized with Kaiser window weights with transition width parameter beta and having length LEN.

Example: 

Vector<float> Z;
Z = kaiser(200,0.5);

See Also: