2e9cf89977676fcdac1206909e8999089d026780,scipy/linalg/special_matrices.py,,toeplitz,#Any#Any#,142

Before Change

    // Form a 1D array of values to be used in the matrix, containing a reversed
    // copy of r[1:], followed by c.
    vals = np.concatenate((r[-1:0:-1], c))
    a, b = np.ogrid[0:len(c), len(r) - 1:-1:-1]
    indx = a + b
    // `indx` is a 2D array of indices into the 1D array `vals`, arranged so
    // that `vals[indx]` is the Toeplitz matrix.
    return vals[indx]


def circulant(c):
    

After Change

    // Form a 1D array containing a reversed c followed by r[1:] that could be
    // strided to give us toeplitz matrix.
    vals = np.concatenate((c[::-1], r[1:]))
    out_shp = len(c), len(r)
    n = vals.strides[0]
    return as_strided(vals[len(c)-1:], shape=out_shp, strides=(-n, n)).copy()


def circulant(c):
    

Instances