chart help

[userid128223]

so i have following field

StudentID	DateStamp	TimeStamp
Eric	3/22/2018	3/22/2018 3:01PM
Eric	3/22/2018	3/22/2018 5:04 PM
Eric	3/22/2018	3/22/2018 9:05 PM
Paul	3/5/2018	3/5/2018 8:05 AM
Paul	3/5/2018	3/5/2018 2:00 PM
Paul	3//5/2018	3/5/2018 6:06 PM

Combo chart:

dimension: StudentID & DateStamp

expression: count(TimeStamp)

My issue is that my date fields is not distinct and its not charting properly. How can i make dimension to only show distinct DateStamp

[sunny_talwar]

You can resolve this in script or use a calculated dimension

Script

Date(Floor(DateStamp)) as DateStamp

CalculatedDimension

Date(Floor(DateStamp))

[userid128223]

Thanks

And how would you write expression that counts how many times Student access system on that date.

[userid128223]

it shows total count, instead of per date total.

[sunny_talwar]

Not sure what you mean? For the sample, what is the expected output?