CROWN.HTML

Explanation of data file - Crown.dat

File name: Crown.doc

Units: English

This file provides an explanation of the data files contained in crown.dat.

CROWN.DAT

Variables:

1. Plot number

2. Tree number

3. Target Basal Area(sq. ft./acre). They are 30, 50, 70, 90, and 150. Note that 150 is not basal area but a code which indicates control plots.

4. Pruning Level (%). 25, 40, and 50 indicate that crowns were pruned to 25, 40 and 50 percent of the total tree height (age 12 and age 15). 100 is a code indicating no pruning.

5-7. Diameter at crown base (in inches) for the sixth, seventh, and eighth inventories.

Following codes are used:

-3.0 = live tree not measured during a given inventory, and

-5.0 = tree removed or died.

Example:

5 386 30 25 11.3 13.9 14.5

Number of observations: 1380

The following code can be used to input Crown.dat into SAS:

data crown ; infile 'c:/crown.dat' ; input pn tn tba pr DCB1 DCB2 DCB3 ; run ;