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VisitSummary.getUniqueVisitors results are inconsistent #2612

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anonymous-matomo-user opened this issue Aug 4, 2011 · 5 comments
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Bug For errors / faults / flaws / inconsistencies etc. wontfix If you can reproduce this issue, please reopen the issue or create a new one describing it.

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@anonymous-matomo-user
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Results returned by the VisitSummary.getUniqueVisitors API call over a date range are not consistent.

For example, the sum of the counts for the following call:

module=API&method=VisitsSummary.getUniqueVisitors&idSite=1&period=month&date=2011-01-01,2011-12-31&format=JSON

do NOT equal the sum of the counts for this call:

module=API&method=VisitsSummary.getUniqueVisitors&idSite=1&period=day&date=2011-01-01,2011-12-31&format=JSON

The same issue arises when comparing period = month to period = year for the same date range. In fact, the numbers seem different for all periods of day,month,week,year. What gives?

See attached files for output of calls over the date range 2011-01-01,2011-12-31 .

@anonymous-matomo-user
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Attachment:
uniqueVisitorsByDay.txt

@anonymous-matomo-user
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Attachment:
uniqueVisitorsByMonth.txt

@anonymous-matomo-user
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Attachment:
uniqueVisitorsByWeek.txt

@anonymous-matomo-user
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Attachment:
uniqueVisitorsByYear.txt

@mattab
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mattab commented Aug 10, 2011

This is expected, a unique visitor can visit the same many times in the same month.

see http://piwik.org/faq/general/#faq_43

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