Signal sampling

[Tathagata Ghose]

Hello,

I’m trying to use a formula which will convert the frequency of my data (I’m not referring to frequencies in the context of signal processing), e.g. monthly data converted to annual totals, quarterly data expanded to be monthly (with all 3 months of a quarter showing the same data value) etc etc. I kind of see relevant functions in the signal sampling functions, but I can’t pinpoint the best method to do these conversions.

Or, maybe using CalendarTime with the right options will automate my conversions on the fly (e.g. I can then just plot monthly and annual data together in a chart and the X-axis is automatically synch-ed and scaled appropriately)?

What would be the best way to mix data of different calendar frequencies together?

Regards
Tatha

[Tathagata Ghose]

Hello,

I’m trying to use a formula which will convert the frequency of my data (I’m not referring to frequencies in the context of signal processing), e.g. monthly data converted to annual totals, quarterly data expanded to be monthly (with all 3 months of a quarter showing the same data value) etc etc. I kind of see relevant functions in the signal sampling functions, but I can’t pinpoint the best method to do these conversions.

Or, maybe using CalendarTime with the right options will automate my conversions on the fly (e.g. I can then just plot monthly and annual data together in a chart and the X-axis is automatically synch-ed and scaled appropriately)?

What would be the best way to mix data of different calendar frequencies together?

Regards
Tatha

[Bernhard Kantz]

If you want to reduce your data you could use the [b]Reduce[/b] function. There is no special function if you want to expand your data.
Three data points have the same value:
[code]
Dim i, r
For Each Row i In DataSet Do
r := DataSet[i]#3
End
r
[/code]
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