_compute_lwork(routine, *args, **kwargs)
Several LAPACK routines compute optimal values for LWORK, which they return in a floating-point variable. However, for large values of LWORK, single-precision floating point is not sufficient to hold the exact value --- some LAPACK versions (<= 3.5.0 at least) truncate the returned integer to single precision and in some cases this can be smaller than the required value.
Round floating-point lwork returned by lapack to integer.
>>> from scipy.linalg import lapackSee :
... n = 5000
... s_r, s_lw = lapack.get_lapack_funcs(('sysvx', 'sysvx_lwork'))
... lwork = lapack._compute_lwork(s_lw, n)
... lwork 32000
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scipy.linalg.lapack._compute_lwork
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