af01f18: Example of raw data file for salaamander ground reaction...
In MorphoFun/kraken: Analyses for bone biomechanics

af01f18

R Documentation

Example of raw data file for salaamander ground reaction force analysis

Description

Example LabView output collected while a tiger salamander (Ambystoma tigrinum) was walking on a force plate. The name of this trial is af01f18. Includes data from the forelimb and hind limb.

Usage

af01f18

Format

A data.frame with 40000 rows and 18 variables.

PercentStance: The percentage of the stance phase when the peak net GRF occurs for that trial.
APAngle.Convert: Angle of the GRF in the anteroposterior direction, in the -90 (posterior) to +90 (posterior) degree range so that 0 degrees represent the transition between anterorior and posterior.
MLAngle.Convert: Angle of the GRF in the mediolateral direction, in the -90 (medial) to +90 (lateral) degree range so that 0 degrees represent the transition between anterorior and posterior.
InterpV.BW: Magnitude of the vertical component of the GRF, in units of body weight.
InterpML.BW: Magnitude of the mediolateral component of the GRF, in units of body weight.
InterpAP.BW: Magnitude of the anteroposterior component of the GRF, in units of body weight.
NetGRF.BW: Magnitude of the net GRF (summation of the vertical, mediolateral, and anteroposterior components), in units of body weight.
Group: The group for comparison. Species codes include: "at" (Ambystoma tigrinum), "pb" (Periophthalmus barbarus), and "pw" (Pleurodeles waltl). Appendage codes include: "Pec" (Pectoral), and "Pel" (Pelvic).
Species: Two-letter abbreviation for the genus and species epithet. Species codes include: "at" (Ambystoma tigrinum), "pb" (Periophthalmus barbarus), and "pw" (Pleurodeles waltl).
Ind: Indentification code for individual animal, with the first two letters as the Species.
Appendage: Appendage codes include: "Pec" (Pectoral), and "Pel" (Pelvic).
Trial: Specific identification code for the Trial. Note: data from for the pectoral and pelvic appendages of an individual can be obtained from the same trial.
InterpV.N: Magnitude of the vertical component of the GRF, in units of Newtons.
InterpML.N: Magnitude of the mediolateral component of the GRF, in units of Newtons.
InterpAP.N: Magnitude of the anteroposterior component of the GRF, in units of Newtons.
SquaredV.N: Squared value of the vertical component of the GRF, in units of Newtons.
SquaredML.N: Squared value of the mediolateral component of the GRF, in units of Newtons.
SquaredAP.N: Squared value of the anteroposterior component of the GRF, in units of Newtons.
NetGRF.N: Magnitude of the Net GRF, in units of Newtons.
APAngle: Angle of the GRF in the anteroposterior direction, in the 0-180 degree range
MLAngle: Angle of the GRF in the mediolateral direction, in the 0-180 degree range

References

Kawano SM, Blob RW. 2013. Propulsive forces of mudskipper fins and salamander limbs during terrestrial locomotion: implications for the invasion of land. Integrative and Comparative Biology 53(2): 283-294.