IK percentiles
This function will estimate a block grade from the cumulative frequency function (cff) for a given percentile. Two interpretations may be applied to the estimate. For example, if a reporting percentile of 0.8 is specified which gives a grade of 5 then we may say that 80% of the block is below 5 and 20% above. Alternatively we may say that there is an 80% chance that the grade of the block is below 5 and a 20% chance that it is above 5.
To run this function: Choose Block model > Indicator kriging > IK percentiles, or...
Minimum value
The minimum value to be used in the extrapolation beyond the limits of the cff. Leave blank if no minimum is to be applied (defaults to zero).
Maximum value
The maximum value to be used in the extrapolation beyond the limits of the cff. Leave blank if no maximum is to be applied (defaults to `infinity'). Note that leaving the default of `infinity' may result in extremely large numbers if a percentile outside of the range of the cff is specified.
Reporting percentile
The percentile (between 0 and 1) for which a grade will be reported.
Constrain?
Enter 'Y' if you wish to restrict the blocks to be estimated or 'N' for unconstrained interpolation. See Make Constraint.
Choose Apply to perform the estimation or Cancel to return to the INDICATOR KRIGING menu.
A real attribute of the form _ike#attribute#percentile_perc will be written for each estimated block.
Messages
??? blocks processed.
The given number of blocks were estimated.
No cumulative frequency function exists for this attribute.
Please run Indicator Kriging first. You must run BLOCK MODELLING Indicator Kriging before using Percentiles.
No model loaded or attribute not selected.
Either there is no current model or there is no specified attribute with which to do indicator kriging. Use BLOCK MODELLING Graphics or MODELSelect Model to select a model, or use FILL Indicator Kriging to select an attribute.