pflm.interp.interp1d

interp1d(x: ndarray, y: ndarray, x_new: ndarray, method: str = 'linear') → ndarray

Interpolate 1D data using linear or spline interpolation.

Parameters:

xnp.ndarray of shape (n,)

Strictly 1D input coordinates. Duplicates are allowed but will be reduced to the first occurrence internally.

ynp.ndarray of shape (n,)

Values at x. Must match x in length.

x_newnp.ndarray of shape (m,)

Query points.

method{“linear”, “spline”}, default=”linear”

Interpolation method.

Returns:

y_newnp.ndarray of shape (m,)

Interpolated values at x_new. The dtype follows x: float32 uses the f32 backend; otherwise f64.

Raises:

ValueError

If any input is not 1D, is empty, sizes mismatch, contains NaN, or method is invalid.

See also

interp2d

Interpolate 2D gridded data.

Notes

• Input duplicates in x are deduplicated using the first occurrence.

• Backend is selected by dtype of x (float32 -> f32; otherwise f64).