I have downloaded a dataset called Real estate valuation data set from https://archive.ics.uci.edu/ml/datasets/Real+estate+valuation+data+set?source=post_page . But I am not able to understand in which format the transaction date is given. They have given some examples like 2013.250=2013 March, 2013.500=2013 June, etc.
I encountered this same problem and I figured that the months were represented as a fraction of a year. So, for instance, June is the 6th month of the year, hence it is 6/12 = 0.5; that's why we had June 2013 as 2013.500, etc.
Related
I have quarterly data for 2018 (Q1-Q3) which I would like to compare with the same time periods from a year ago so 2017 Q1-Q3.
Where it gets a little tricky is that I would like for my workbook to be smart enough in Q1 2019 to know that it only compares for one quarter in 2018 and when Q2 2019 data rolls in it uses 2 quarters and so on and so on.
Is this possible in Tableau?
For those that are interested I have generated some random data in the format of my workbook in Excel for import into Tableau. Here is the link to the data.
Try the following:
IF DATEPART('year',[datefield]) - 1 = DATEPART('year',TODAY())
AND DATEPART('quarter',[datefield]) < DATEPART('quarter',TODAY())
THEN [valueField]
END
This will compare with previous year's data.
I need to modify some Tableau dashboards so that they show from the previous month going back 12 months.
For example, it is August 2017 now, so the company wants to see the 12 months ending at July 2017. In other words: Aug 2016, Sept 2016, Oct 2016...June 2017, July 2017.
Using Tableau's relative date filter, users can easily select "previous month" (July 2017) or "previous 12 months" (Sept 2016-Aug 2017) on the relative date filter. But they can't choose previous month going back 12 months (Aug 2016-July 2017).
I was thinking of writing a formula that sets current month as 0, previous month as 1, month before that as 2 etc and that way I can filter to only show months 1, 2, ...12. And not show month 0, the current month.
Is this the best approach? I thought Tableau would have an option for this - surely a lot of companies want to see a year worth of data ending at the previous month? (Since the current month is not yet complete so they don't want to see a partial month's data).
Thanks for your ideas!
You are right about this being a common requirement. I do 'Last 12 months' filter too which excludes current month since it is not a full month.
In my case I have defined a True/False type calculated field which I use to filter records which show in the dashboards.
Here is the formula that I use:
DATEDIFF('month',[My Timestamp Field],Today()) < 13 and DATEDIFF('month',[My Timestamp Field],Today()) > 0
I would like a spreadsheet row to contain the date of today, but only on every other Thursday, changing at 9:30 am.
To give you an example:
Next thursday the 21.07.16 it shell contain "21.07.16".
Until in exactly 14 days on thursday the 4.08.16 it shell contain this date and than change to 4.08.16.
Also I would like this change to happen at 9:30 am.
I can not think of a way how to do this. Can you point me into a direction?
One has to set a starting datetime somewhere in the past, such as July 7, 2016, at 9:30am.
Then find the difference between the current and the starting datetime. Truncate this difference down to a multiple of 14, and add this value to the starting datetime.
The datetimes are represented in Sheets numerically as the number of days since December 30, 1899. In this system, 2016-07-07 9:30 is about 42558.4 So the formula would be
=42558.4 + 14*floor((now()-42558.4)/14)
The output should be formatted as a date.
A less cryptic version is
=value("2016-07-07 09:30") + 14*floor((now() - value("2016-07-07 09:30"))/14)
(value follows the local convention for parsing dates, but I hope the format I used will be understood universally.)
What date time format is this : 735715:37344280
<ExecDateTOD Friendly="Monday April 27, 2015 10:23:00am">735715:37344280</ExecDateTOD>
It's found in C:\Windows\Performance\WinSAT\DataStore\file_name.xml, and is the date time when the Windows Experience Index Assessment test was run.
Any idea how it's structured and can be edited? I need to change it to a previous years Date.
It seems that this format is called VariantTime, in MSDN the call to convert time is called VariantTimeToSystemTime. So it may be number of days, with decimal part after the :.
For the timestamp 735715:37344280
The first number (the one before the colon) is the number of days since the year 0:
735715 / 365 = 2015.66
The second number (the one after the colon) is the number of milliseconds that have passed within the current day.
37344280 / (1000*60*60) = 10.37 hours since start of day
So you can just subtract 365 days from the first number to obtain the previous year like this:
<ExecDateTOD Friendly="Monday April 27, 2014 10:23:00am">735350:37344280</ExecDateTOD>
Note that there were no leap years in either 2015 or 2014, so these year are exactly 365 days long.
Here is a link to a page with another <ExecDateTOD> tag where you can compare: http://www.scribd.com/doc/82935159/2012-01-30-16-00-49-986-Formal-assessment-Recent-WinSAT#scribd
I think that if you subtract 365 from that number, you'll be in previous year.
That number seems to be days since the year 0. The first part might be the number of days, taking into account leap years, etc). The second part the time coded in some way.
I have a variable called sentDate which stores the month and day from Nov 27th - Dec 6th.Each day has a number of sentiment ratings that it represents therefore I need to assign unique day codes to each day so I can perform...
allSents(dayCodes==1)
So far I have managed to assign day codes using...
[a,b,dayCodes]=unique(sentDate);
[d,e,allSents]=unique(sentiment);
However the day codes take the last digit on the date e.g 27th becomes 7, 28th becomes 8, etc. I need it so the day codes start from 1 and increase for each day until the 6th of December, therefore 1-11.
Any idea on how I may do this ?
have you tried the datenum function? then subtract off whatever offset to give the appropriate start day number.
For those who may have a similar problem, by specifying stable in as a parameter e.g
[a,b,dayCodes]=unique(sentDate,'stable');
Will specify the daycodes in the same order as in sentDate.