Geometric sequence
Allows you to define an n-fold geometric sequence. That is, the dilution sequence has 'n' steps, and each of the 'n - 1' terms after the first is found by multiplying the previous by a fixed number.
The dose value for step number 'j' of an n-fold sequence is given by:
Example
| First dose | Base | 1st step | 2nd step | 3rd step | ... |
| = First dose | = First dose / Base | = First dose / Base^2 | = First dose / Base^n | ||
| 1 | 2 | 1.0 | 0.5 | 0.25 | 0.125 |
| 8 | 2 | 8.0 | 4.0 | 2.0 | 1.0 |
| 1 | 0.5 | 1.0 | 2.0 | 4.0 | 8.0 |
| 5 | 3 | 5.0 | 1.67 | 0.56 | 0.19 |
Note: If you add an Initial working concentration element to define the concentration of the first step in this sequence, the value you enter overrides the value implied by the predilution factors of this preparation scheme and the concentration settings of referencing assay elements. Please consult the help page on the Initial working concentration element for additional information.
This element has the following attributes:
| Data type | Multiplicity | Usage | Default value |
| Node | 1...1 | required | none |
Context:
/Dose-response analysis/Setup/Preparation schemes/Multi-dose scheme/alternatives/