Function

vDSP_minviD

Calculates the minimum value and corresponding index in a double-precision vector.

Declaration

void vDSP_minviD(const double *__A, vDSP_Stride __IA, double *__C, vDSP_Length *__I, vDSP_Length __N);

Parameters

__A

Double-precision real input vector.

__I

Stride for A.

__C

Output scalar.

__IC

Output scalar index.

__N

The number of elements to process. If N is zero (0), this function returns -INFINITY in C, and the value in IC is undefined.

Discussion

This function calculates the minimum value and its corresponding index of the first N elements of A and writes the results to C and IC respectively:

A diagram showing the operation of the vDSP_minvi function. There are three rows. The top row represents the input, vector A. The second row represents the minimum value operation. The bottom row represents the output, vector C. The diagram has connecting lines from the input vectors to the operation and from the operation to the output vector indicating the relationships between the input and output.

The index is the actual array index, not the pre-stride index. If vector A contains more than one instance of the minimum value, IC contains the index of the first instance.

The operation is:

*C = INFINITY;
for (n = 0; n < N; ++n)
{
    if (*C > A[n * I])
    {
        *C = A[n * I];
        *IC = n * I;
    }
}

See Also

Minimum Calculation

vDSP_minv

Calculates the minimum value in a single-precision vector.

vDSP_minvD

Calculates the minimum value in a double-precision vector.

vDSP_minvi

Calculates the minimum value and corresponding index in a single-precision vector.

vDSP_minmgv

Calculates the minimum magnitude in a single-precision vector.

vDSP_minmgvD

Calculates the minimum magnitude in a double-precision vector.

vDSP_minmgvi

Calculates the minimum magnitude and corresponding index in a single-precision vector.

vDSP_minmgviD

Calculates the minimum magnitude and corresponding index in a double-precision vector.