Options
FIRSTPLOT = string token |
Defines the starting location for numbering the plots (lowleft, lowright, upleft, upright); default uple |
PLOTORDER = string token |
Defines the order in which the numbers are allocated (colserpentine, colbycol, rowserpentine, rowbyrow); default rowb |
Parameters
NROWS = scalars |
Number of rows in the design |
NCOLUMNS = scalars |
Number of columns in the design |
PLOTNUMBER = factors |
Saves the plot numbers |
Description
FPLOTNUMBER generates unique numbers that can be used to identify the plots in a row-by-column design. These are often used to define the order in which various husbandry operations will be carried out. Several ways are therefore provided to specify the order.
The FIRSTPLOT option specifies where the numbering should start, as follows:
lowleft |
left-hand plot at the bottom of the design i.e. in the final row and first column; |
lowright |
right-hand plot at the bottom of the design i.e. in the final row and final column; |
upleft |
eft-hand plot at the top of the design i.e. in the first row and first column (default); |
lupright |
right-hand plot at the top of the design i.e. in the first row and final column. |
The PLOTORDER option defines the order in which the plots are then allocated:
colserpentine |
column-by-column in a serpentine way e.g. top-to-bottom, then bottom to top, and so on; |
colbycol |
column-by-column taking the same direction for every column; |
rowserpentine |
in a serpentine way e.g. left-to-right, then right-to-left, and so on; |
rowbyrow |
row-by-row taking the same direction for every row (default). |
The numbers of rows and columns defined by the NROWS and NCOLUMNS parameters, respectively. The PLOTNUMBER parameter saves the numbers, in a factor.
Options: FIRSTPLOT, PLOTORDER.
Parameters: NROWS, NCOLUMNS, PLOTORDER.
Method
The procedure first forms row and column factors using the GENERATE directive, with the FIRSTPLOT option indicating whether they are generated with their levels in ascending or descending order. The plot numbers are then calculated from those factors. With the serpentine orders, a different calculation is required for the even- and the odd-numbered rows or columns.
See also
Commands for: Design of experiments.
Example
CAPTION 'FPLOTNUMBER example'; STYLE=major
SCALAR nr,nc; VALUE=7,5
FACTOR [NVALUES=nr*nc; LEVELS=nr] Row
FACTOR [NVALUES=nr*nc; LEVELS=nc] Col
GENERATE Row,Col
"Display plot number from all 4 corners by 4 orderings"
FOR FP = 'upleft','upright','lowleft','lowright'
FOR PO = 'rowbyrow','rowserpentine','colbycol','colserpentine'
FPLOTNUMBER [FIRSTPLOT=#FP; PLOTORDER=#PO] NROWS=nr; NCOLUMNS=nc; \
PLOTNUMBER=Plot
TABULATE [CLASS=Row,Col] !(#Plot); MEANS=rc
TXCONST [TEXT=head] 'FIRSTPLOT=',FP,' PLOTORDER=',PO
CAPTION head; STYLE=minor
PRINT [SQUASH=yes; IPRINT=*; RLWIDTH=6] rc; DECIMALS=0; FIELD=4
ENDFOR
ENDFOR