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 Bug in frequency count with dates?
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a_h

Austria
11 Posts

Posted - 06/25/2026 :  04:19:38 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 2025 (64-bit) SR1
Operating System: Win11

The frequency count feature is one of my most regularly used features and I find it superuseful.

However, I recently used frequency count (mark column -> right click -> frequency count) where the x-column is set to date.

It generates the expected statistical frequency information, however, the generated date bins are off by two days.

For example, the frequency count statistics show that a certain event happened 28-times on the day June, 2 (class starts at June 2 12:00 and goes to June 3 12:00).

Looking into the actual data (that is the basis for the frequency count) this is not correct as the day where this event happened 28-times is actually June 1 at 06:47 which is the May 31 class (that begins on May 31 12:00 and ends on June 1 12:00).

Please advise how I can fix this, thanks!!

a_h

Austria
11 Posts

Posted - 06/25/2026 :  04:24:51 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Frequency count result:



Actual data showing the event to occur 28-times on June 1 which would belong to the May 31 class:

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a_h

Austria
11 Posts

Posted - 06/25/2026 :  04:27:15 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
another image of the frequency count results

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YimingChen

1698 Posts

Posted - 06/25/2026 :  09:51:23 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

This seems like a bug, I have reported the issue (ref: ORG-33834) to fix it. Thank you.

Yiming
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NadeeshaSupport

USA
14 Posts

Posted - 06/25/2026 :  10:19:58 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

This seems to be a bug.

For now, I've extracted the date portion from the column and reproduced the correct frequency bins.

Please see attached.

These are the steps for reproducing:

1. Right click and select Properties
2. Select Date under Options -> Format
3. Select Custom Display under Display and enter dd.MM.yyyy HH':'mm':'ss'.'###
4. Click OK
5. Enter =int(col(A)) under the F(x)= designation in column B
6. Right click and select Properties
7. Select Date under Options -> Format
8. Select Custom Display under Display and enter dd.MM.yyyy


Thanks,
Nadeesha
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NadeeshaSupport

USA
14 Posts

Posted - 06/25/2026 :  10:21:32 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
https://my.originlab.com/ftp/forum_and_kbase/Images/date%20freq%20bug2.ogwu
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a_h

Austria
11 Posts

Posted - 06/29/2026 :  02:59:15 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

many thanks for looking into this!!

Thank you also very much for your work-around - it helps a bit to mitigate the issue, but plotting is consequently painful (as it's no longer a real date but treated as text).

Thanks, Hannes

EDIT: found a solution also for that, so all good now - thank you!

Edited by - a_h on 06/29/2026 03:23:16 AM
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