the order of data, from left (begin) to right (end)?

[Aspriter]

I have a quick question regarding the order of data,
so each row means a time series, does it start from left to right (small column index to large index), or the other direction?
Thanks!

[vangspiliot]

That is correct. Each row is a time series (100,000 in total) starting from the left.

[Aspriter]

Hi,
Thanks for your answer,
One more question, in the paper
https://www.sciencedirect.com/science/article/pii/S0169207018300785
How is the SMAPE calculated for each category in table 1? mean of the time series in that category? or median? or weighted average?

[Mcompetitions]

It is the mean of the time series in that category.