Returns the cumulative product of elements of input
in the dimension dim
.
For example, if input
is a vector of size N, the result will also be a vector of size N, with elements.
y i = x 1 × x 2 × x 3 × ⋯ × x i y_i = x_1 \times x_2\times x_3\times \dots \times x_i yi=x1×x2×x3×⋯×xi
dtype (torch.dtype
, optional) – the desired data type of returned tensor. If specified, the input tensor is casted to dtype
before the operation is performed. This is useful for preventing data type overflows. Default: None.
out (Tensor, optional) – the output tensor.
Example:
>>> a = torch.randn(10) >>> a tensor([ 0.6001, 0.2069, -0.1919, 0.9792, 0.6727, 1.0062, 0.4126, -0.2129, -0.4206, 0.1968]) >>> torch.cumprod(a, dim=0) tensor([ 0.6001, 0.1241, -0.0238, -0.0233, -0.0157, -0.0158, -0.0065, 0.0014, -0.0006, -0.0001]) >>> a[5] = 0.0 >>> torch.cumprod(a, dim=0) tensor([ 0.6001, 0.1241, -0.0238, -0.0233, -0.0157, -0.0000, -0.0000, 0.0000, -0.0000, -0.0000])
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