Denotes any past input values (and optional past step), that next output
values derive from.
A nested hierarchy of the form any-value-past[any-value-step-past],
indexing values, each nesting level denotes how to derive from:
0. any-value-past: any/all past input value/s, at 1st step past.
any-value-step-past: any/all past input value/s, at any given step
past.
The value/s to derive from may be given as:
true: derives from all values.
number: derives from the given values index.
If given a true or number (denoting value/s but no step), the next
output value derives from the given values at the 1st step past.
To specify a different step, pass an object denoting both the value (as
above) along with a step; in the form {value:true|number,step?:number},
to derive from the value at any given step past (or the 1st step past
if not given).
Any omitted values are ignored.
See derives for more on how these are derived by the next output values.
Denotes any past input
values(and optional paststep), that next outputvaluesderive from.A nested hierarchy of the form
any-value-past[any-value-step-past], indexingvalues, each nesting level denotes how to derive from: 0.any-value-past: any/all past inputvalue/s, at 1ststeppast.any-value-step-past: any/all past inputvalue/s, at any givensteppast.The
value/s to derive from may be given as:true: derives from allvalues.number: derives from the givenvaluesindex.If given a
trueornumber(denotingvalue/s but nostep), the next outputvaluederives from the givenvaluesat the 1ststeppast.To specify a different
step, pass anobjectdenoting both thevalue(as above) along with astep; in the form{value:true|number,step?:number}, to derive from thevalueat any givensteppast (or the 1ststeppast if not given).Any omitted
valuesare ignored.See
derivesfor more on how these are derived by the next outputvalues.See