store data by day and hour - powershell - powershell

Question

Id like to be able to store, change, and retrieve data by day and hour using powershell.
For instance, I have a list of data from which I can extract the dayOfMonth, hour, max, active, average.
I would like to be able to stick the 3 latter values in an array indexed by day and hour.
The raw data might look like this: (the avg val wouldnt be there yet):
12/13/19,08:13:04,13,13
12/13/19,08:43:04,10,9
12/13/19,09:13:04,11,9
12/13/19,09:43:04,12,7
12/13/19,08:13:04,10,12
12/14/19,08:13:04,8,2
12/14/19,08:43:04,10,4
12/14/19,09:13:04,8,7
12/14/19,09:43:04,11,1
12/14/19,10:13:04,9,7
I wish to be able to store the maxChannel,maxActive, and average, for each hour of each day, so the data in the array would look like this:
day,hr,max,actv,avg
13,8,13,13,11
13,9,12,9,8
13,10,12,2,2
14,8,10,4,3
14,9,11,7,4
14,10,9,7,7
I tried to store it in a previously created array
$arrOut2 = #() #summary data
like this(which needless to say didnt work):
initialize each needed row
ForEach ($line in $arrFile)
{
$arrLine = $line.split(",") #create an array with each word in line its own element
$Date=$arrLine[0]
$Time=$arrLine[1]
$ChanM=$arrLine[2]
$ChanA=$arrLine[3]
$DateA=$Date.Split("/")
$Day=$DateA[1]
$TimeA=$Time.Split(":")
$Hour=[int]$TimeA[0]
$arrOut2 += ,#[$Day][$Hour](0,0,0)
}
ForEach ($line in $arrFile)
{
$arrLine = $line.split(",") #create an array with each word in line its own element
$Date=$arrLine[0]
$Time=$arrLine[1]
$ChanM=$arrLine[2]
$ChanA=$arrLine[3]
$DateA=$Date.Split("/")
$Day=$DateA[1]
$TimeA=$Time.Split(":")
$Hour=[int]$TimeA[0]
IF (($Hour -ge 8) -And ($Hour -lt 17)) {
$AvCnt=$AvCnt+1 #count Intervals for averaging
$AvTot=$AvTot+$ChanA #sum active channels for averaging
$AvgActChan=$AvTot/$AvCnt
IF($ChanC -GT $arrOut2[$Hour][0]){$arrOut2[$Hour][0]=$ChanC} #grab max chanC frm current hr
IF($ChanA -GT $arrOut2[$Hour][1]){$arrOut2[$Hour][0]=$ChanC} #grab max chan Actv frm curr hr
$ArrOut2[$Day][$Hour][2]=$AvgActChan #grab curnt chan Avg Active from current hour
}
}
As you can see in the first forloop, I am attempting to use day and hour as indices. Powershell just doesnt like that - at least in that format.
Does anyone have any ideas of how I can accomplish this? I know I could keep track of the current day and hour, then process it in separate variables, then when I see the day or hour change, write those to a separate array, but the data is quite a bit messier than Ive represented in this example and that would make the whole thing quite messy, when processing it within an array would be so much cleaner.
Appreciate any suggestions
thanks

Answer 1

I would sort it this way:
$data = import-csv data.txt -header date,time,a,b
$data | sort date,time