- rrd->cdp_prep->scratch[CDP_hw_intercept].u_val = DNAN;
- rrd->cdp_prep->scratch[CDP_hw_last_intercept].u_val = DNAN;
- rrd->cdp_prep->scratch[CDP_hw_slope].u_val = DNAN;
- rrd->cdp_prep->scratch[CDP_hw_last_slope].u_val = DNAN;
- rrd->cdp_prep->scratch[CDP_null_count].u_cnt = 1;
- rrd->cdp_prep->scratch[CDP_last_null_count].u_cnt = 1;