part 2 missing data despite at least 1 valid day

[dominika]

Hi Vincent, 

I hope that you had a good summer!

I have used GGIR 2.0 on a small sample of files with the aim to reduce data only with parts 1 and 2. 

Question 1:  

I am specifying a number of valid hours as ≥ 10 for a waking hours protocol. 

However, I have a subject with N Valid hours ≥ 10 for at least one valid day for whom I have missing data for day windows defined in qwindows and specifically variables defined based on thresholds as ilevels.

One reason could be related to complete_24hrcycle being less than 1 for that subject. However, I am not sure why the values would not be computed for a person level summary? 

Would you be able to clarify?

I included the output for this individual along with my GGIR syntax.

Question 2: Does the length of qwindow have to be at least 2x value specified in M5L5res or at least 3 x this value? I have a qwindow of 1 hour and M5L5res = 0.5 and receive no values for that window.

Thank you in advance for your help,

Dominika

[Vincent van Hees]

Hi Dominika

Question 1:

You defined argument includedaycrit twice in your call to g.shell.GGIR, and the second time you set it to 16. Make sure either of the two settings is removed.

Question 2:

GGIR performs the MX analysis per qwindow if the window length is larger than C in the following formula:

A = number of epochs per minute

B = minimum value in winhr object

C = A * 60 * min(B) * 1.2 

Vincent

Dr. Vincent van Hees

Independent consultant

https://accelting.com/

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