Functions | |
void | arm_var_f32 (float32_t *pSrc, uint32_t blockSize, float32_t *pResult) |
void | arm_var_q31 (q31_t *pSrc, uint32_t blockSize, q63_t *pResult) |
void | arm_var_q15 (q15_t *pSrc, uint32_t blockSize, q31_t *pResult) |
Calculates the variance of the elements in the input vector. The underlying algorithm is used:
Result = (sumOfSquares - sum2 / blockSize) / (blockSize - 1)
where, sumOfSquares = pSrc[0] * pSrc[0] + pSrc[1] * pSrc[1] + ... + pSrc[blockSize-1] * pSrc[blockSize-1]
sum = pSrc[0] + pSrc[1] + pSrc[2] + ... + pSrc[blockSize-1]
There are separate functions for floating point, Q31, and Q15 data types.
Variance of the elements of a floating-point vector.
[in] | *pSrc | points to the input vector |
[in] | blockSize | length of the input vector |
[out] | *pResult | variance value returned here |
Definition at line 69 of file arm_var_f32.c.
Variance of the elements of a Q31 vector.
[in] | *pSrc | points to the input vector |
[in] | blockSize | length of the input vector |
[out] | *pResult | variance value returned here |
Scaling and Overflow Behavior:
Definition at line 66 of file arm_var_q31.c.
Variance of the elements of a Q15 vector.
[in] | *pSrc | points to the input vector |
[in] | blockSize | length of the input vector |
[out] | *pResult | variance value returned here |
Scaling and Overflow Behavior:
Definition at line 64 of file arm_var_q15.c.