| Muscle {nlme} | R Documentation |
The Muscle data frame has 60 rows and 3 columns.
This data frame contains the following columns:
an ordered factor indicating the strip of muscle being measured.
a numeric vector giving the concentration of CaCl2
a numeric vector giving the shortening of the heart muscle strip.
Baumann and Waldvogel (1963) describe data on the shortening of heart muscle strips dipped in a CaCl_2 solution. The muscle strips are taken from the left auricle of a rat's heart.
Baumann, F. and Waldvogel, F. (1963), La restitution pastsystolique de la contraction de l'oreillette gauche du rat. Effets de divers ions et de l'acetylcholine, Helvetica Physiologica Acta, 21.