Muscle                 package:nlme                 R Documentation

Contraction of heart muscle sections

Description:

     The 'Muscle' data frame has 60 rows and 3 columns.

Format:

     This data frame contains the following columns:

     Strip an ordered factor indicating the strip of muscle being
          measured.

     conc a numeric vector giving the concentration of CaCl2

     length a numeric vector giving the shortening ofthe heart muscle
          strip.

Details:

     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.

Source:

     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*.

Examples:

     data(Muscle)

