Generates a 2-level fractional factorial design.
Uses standard defining relations for common fractions. The result is expressed in coded variables where the low and high levels are -1 and +1, respectively.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| integer(kind=int32), | intent(in) | :: | nfactors |
Number of factors. |
||
| integer(kind=int32), | intent(in) | :: | fraction |
Fraction level (1 for 1/2, 2 for 1/4, etc.). |
||
| real(kind=real64), | intent(out) | :: | tbl(:,:) |
Design table (runs x factors) in coded variables, where each value is either -1 or +1. |