How to create price weighted index function?

I'm looking to calculate the following price weighted function using the average price data AvgPrice2019. It just results in NaN. Can someone help?

I still keep getting NaN. Do you know why?

[Jan]

Typing an answer would be easier, if you post the code as text, not as screenshot. Then the readers can copy&paste it to show a modification.

Answer 1

[Jan]

Start with using Matlab methods instead of the loops:

avg      = AvgPrice2019;
meanAavg = sum(avg);
pweight  = avg / meanAvg;

If this replies NaNs only, a value in avg is infinite:

avg(~isfinite(avg))

What do you see?