When will ball 25 drop? Predicting future observations using data

[DaveC426913]

Sure. Your dataset has "plate 54: date, plate 55: date, plate 57: date, plate 58: date, ...

Right. Which is why you originally introduced a distinct index.

I was treating the array index as the x-axis.
i.e. my values would end up being:
item[23]: CDJ
item[24]: CDK
item[25]: CDM
So, CDL is not there, and therefore no gap where there should be a gap, putting the next item out of line.

For you:
item[23]: {index:23, plate: CDJ}
item[24]: {index:24, plate: CDK}
item[25]: {index:26, plate: CDM}
So the trend is conserved.

I see now.

 

[Chestermiller]

I think what you may be looking for is Kalman Filter.