s_ba2 = kdm$fit$female$s_b2 in Step 3 is null

[wiwi456]

When projecting KDM bioage into the CALERIE using the kdm_calc function,

The fit is defined as the trained fit, while s_ba2= kdm$fit$female$s_b2 is a null value. Thus, s_ba2 was calculated separately in CALERIE using the following code.

It confused me since I noticed that when calculate test modified KDM in NHANES4, the s_ba2 = train_fem$fit$s_ba2 is defined as the trained parameter.

Could you please answer my confusion? Thank you in advance for your time!

[dayoonkwon]

This was a typo in the vignette example — s_b2 should be s_ba2. Fixed in #56.