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spectrochempy.ones_like

ones_like(dataset, dtype=None, **kwargs)[source]

Return NDDataset of ones.

The returned NDDataset have the same shape and type as a given array. Units, coordset, … can be added in kwargs.

Parameters

  • dataset (NDDataset or array-like) – Object from which to copy the array structure.

  • dtype (data-type, optional) – Overrides the data type of the result.

  • **kwargs – Optional keyword parameters (see Other Parameters).

Returns

oneslike – Array of 1 with the same shape and type as dataset .

Other Parameters

  • units (str or ur instance) – Units of the returned object. If not provided, try to copy from the input object.

  • coordset (list or Coordset object) – Coordinates for the returned object. If not provided, try to copy from the input object.

See also

full_like

Return an array with a given fill value with shape and type of the

input.

zeros_like

Return an array of zeros with shape and type of input.

empty_like

Return an empty array with shape and type of input.

zeros

Return a new array setting values to zero.

ones

Return a new array setting values to one.

empty

Return a new uninitialized array.

full

Fill a new array.

Examples

>>> x = np.arange(6)
>>> x = x.reshape((2, 3))
>>> x = scp.NDDataset(x, units='s')
>>> x
NDDataset: [float64] s (shape: (y:2, x:3))
>>> scp.ones_like(x, dtype=float, units='J')
NDDataset: [float64] J (shape: (y:2, x:3))