guava {leafSTAR}

Leaf angles of guava trees

Description

The guava data frame has 239 rows and 11 columns

Usage

guava

Format

This data frame contains the following columns:

tree.ID Identification of the tree.

leaf.ID Identification of the leaf.

measure.ID Number of observation (from 'Ahmes').

sector Sector of the tree where leaf data was collected, with five levels corresponding to the north, east, south, and west sectors of the crown base (1N, 2E, 3S, 4W, respectively) and the top crown sector (5A).

azimuth Azimuth angle in degrees.

pitch Pitch angle in degrees.

roll Roll angle in degrees.

course Course angle in degrees with the zero placed at South (old 'Ahmes' version)

LA.cm2 Leaf area.

tilt.degrees Tilt angle calculated from pitch and roll with a changed reference system (horiz = T).

course.degrees Course angle in degrees with the zero placed at North (latest 'Ahmes' version 1.0).

Details

These data are measurements of four leaf position angles of 239 leaves in five guava trees (Psidium guajava), each leaf in a row. guava is an object of class data.frame and results from applying the function fixfile to the output of an earlier version of 'Ahmes', where the reference for course was placed at South.

References

guava Ventre-Lespiaucq, A., et al. Unpublished data.

Ahmes 1.0 https://play.google.com/store/apps/details?id=com.movil.hoja.movihoja.ahmes&hl=en

Escribano-Rocafort, A.G., Ventre-Lespiaucq, A.B., Granado-Yela, C., Lopez-Pintor, A., Delgado, J.A., Munoz, V., Dorado, G.A., Balaguer, L. (2014) Simplifying data acquisition in plant canopies- Measurements of leaf angles with a cell phone. Methods in Ecology and Evolution 5:132-140. doi:10.1111/2041-210X.12141.