skcuda.misc.var(x_gpu, ddof=0, axis=None, stream=None, keepdims=False)[source]

Compute the variance along the specified axis.

Returns the variance of the array elements, a measure of the spread of a distribution. The variance is computed for the flattened array by default, otherwise over the specified axis.

  • x_gpu (pycuda.gpuarray.GPUArray) – Array containing numbers whose variance is desired.
  • ddof (int (optional)) – “Delta Degrees of Freedom”: the divisor used in computing the variance is N - ddof, where N is the number of elements. Setting ddof = 1 is equivalent to applying Bessel’s correction.
  • axis (int (optional)) – Axis along which the variance are computed. The default is to compute the variance of the flattened array.
  • stream (pycuda.driver.Stream (optional)) – Optional CUDA stream in which to perform this calculation
  • keepdims (bool (optional, default False)) – If True, the axes which are reduced are left in the result as dimensions with size one.

out – variance of elements, or variances of elements along the desired axis.

Return type: