How to use Gridd_winversion2:

 

1. Launch the program Gridd_winversion2 by double clicking on the icon.

 

2. Enter the upper X,Y limits for the bivariate frequency distribution to be determined.

Example: Enter 14,54 for the given data (for C. leptoporus, 2 input files, i.e. Inputxxxxxxxxxx1.txt and Inputxxxxxxxxxx2.txt, with the first column being diameter, the second column being number of elements). With 14 micrometers and 54 elements entered, gridding will be performed until and including 14 microns and until and including 54 elements.

 

For the G. menardii data enter 700,1600 instead of 14,54 (i.e. the X-values (spiral height) ranges from 0 to 700 micrometers and the Y-values (axial length) ranges from 0 to 1600 micrometers).

 

3. Enter the grid-cell sizes DX and DY. Example: For C. leptoporus enter 1,2. In this case the grid-cells are 1 micrometer long and 2 elements wide. With the above given limits a matrix will be given having 14 X-intervals (i.e. 14 columns) and with 27 Y-intervals (27 rows).

 

For the G. menardii data enter 50,100 instead of 1,2. In this case the bin-width along the X-axis is 50 micrometers and the bin-width along the Y-axis is 100 micrometers.

 

4. Next, enter the name of the list containing the sample names. Example: enter List_of_files.txt. Note, that on prompting, the appendix .txt must be typed as well; the string may not be longer than 20 characters.

 

5. Next, the program prompts, whether you wish a formatted output (=0) or a non-formatted output (=1). The Grid_to_Vox programs handle a non-formatted input. Enter 1 if you wish to use the output files for the Grid_to_Vox programs.

 

Make sure the file List_of_files is an asci text file (depending on the settings of your PC, the appendix .txt of the file icon does not appear). In the file List_of_files the names of each file to be gridded must be indicated with the appendix .txt to each filename. The end of file should be marked with a carriage return. Example:

 

Inputxxxxxxxxxx1.txt

Inputxxxxxxxxxx2.txt

<CR>

 

6. The program generates one text file per sample file containing the frequency distribution matrix. In the above example two output files are generated, that can be taken for the input in the Grid_toVox programs, i.e.

 

Inputxxxxxxxxxx1_grd

Inputxxxxxxxxxx2_grd

 

7. Terminate program run by hitting a key and then return.

 

8. In the output files the absolute frequency matrix is given in specimens per grid-cell.

Rows indicate the centers of intervals along the diameter axis (starting with 0.5 as the center from 0 micrometers to 1 micrometers, and ending with 13.5 for the interval from 13 micrometers to 14 micrometers).

Columns indicate the centers of intervals along the number of elements axis (starting with 1 as the center from 0 elements to 2 elements, and ending with 53 for the interval from 52 elements to 54 elements).