Function gsl_sys::gsl_matrix_float_alloc_from_block

pub unsafe extern "C" fn gsl_matrix_float_alloc_from_block(
    b: *mut gsl_block_float, 
    offset: usize, 
    n1: usize, 
    n2: usize, 
    d2: usize
) -> *mut gsl_matrix_float