2.1 Readdata <filename>

  The first thing to do is to read some data into the program. The data file should be in ``free field'', ``white spaced'' ascii format. Each line corresponds to one individual plant and should contain the following variables:

i

The plant identification number

x_i

The x-coordinate of the plant.

y_i

The y-coordinate.

z_i

The z-coordinate.

t_i

The time at which each plant started flowering.

m_i

Some variable related to the amount of pollen produced by each plant

k_i

The genotype of each plant. (Only homozygotes are currently handled by the program, although handling heterozygotes would be straigthforward to implement.) Let k_i=1 for plants with genotype AA, and k_i=2 for genotype aa.

N_i

The total number of seeds collected from plant i.

M_i

The number of seeds pollinated by the first plant variety.

Variables that haven't been measured should be replaced by sample means or should be set equal to zero.