I am trying to turn a count of strings into a calculated field, but I am not able to use the drop down menu in the calculated field.
It is a little unclear what you are trying to do here.
If you are trying to count the number of unique membership IDs then you need to write a formula like CountD(Member ID). You will then have a measure that gives the total number of member IDs in the database.
If , on the other hand, you want to count the number of times a member appears in the database, you could use Count(Member ID). Then, when you drag the Member ID to a row, you can drag the new measure you have creates and get a table of the counts for each member.
Related
I have data that is "filtered" through three groups.
First group is defined by departments, second is defined by course id and third is for individual class session id (i.e. room and schedule). Also the source query is giving me the list of all students for each class session, and this causes that the other columns get repeated for every student (i.e. credits per course, total enrollment per session, total students dropped per session, total students auditing per session, etc).
When you drop any of those query counts on the report group's footer the sum is not correct. For example if we have 10 students for a session our sum is 100 enrollment. I want to count 10 enrolled students only once.
The amounts are not shown multiple times because I placed the fields on the group header. So on every group break the row of data is displayed only once.
I believe I need a custom running total and not the default created when you drag and drop the field on the group's footer.
I got something working.
On the report Outline I right clicked on 'Variables' and 'Create Variable'.
For example for the audit count I did the following:
Named my variable 'sum_au'
Value Class Name set to java.math.BigDecimal
Calculation set to Sum
Expression set to the query field for the audit total 'AU': $F{AU}
Increment Type set to [Group]GroupBy_CRN
Reset Type set to [Group]GroupBy_CrseNum
All other fields left untouched (default values)
Once this variable is created you can drag and drop it to the CrseNum Group Footer and it will add the values only once per break on the course session id (CRN).
I will reproduce this for the other values to see if this solution is consistent...
How can I extract the IN count portion of a Tableau set? I can see the IN/OUT counts when I drop the set into Text but can't figure out how to get at the IN value by itself.
Ultimately, I want to create a Pie Chart of three sets with just the IN counts as the measures.
I am using Tableau Public if that is a factor.
You have to be a little careful about specifying what you wish to count.
One way to think of a set is as a Boolean function that gives a value to each data record denoting whether that record is associated with the set.
Another way to think of a set is as a mathematical set whose members are a subset of the values for some discrete field. (Or Tuple of fields)
The difference between the two views is really just a mindset, whether you consider the set as a Boolean function whose domain is a data row in the data source, or whose domain is the field on which the set definition is based.
Say you are looking at Tableau’s Superstore data set where each data record is a line item for a product attached to an order.
If your set is based on the field Region, say its called [My Favorite Regions] and currently contains {“East”, “Central”} do you want your count to be 2 (i.e. the number of regions in the set) ? Or do you want your count to be in the tens of thousands (i.e the number of line items on orders from the regions in the set)? Or something in between, maybe the number of distinct orders (i.e. order ids) within the selected regions...
If you want to count data rows that are associated with the set, you can simply filter by the set and calculate SUM([Number of Records[). If you want to count the regions in the set even though the level of detail of the data is at the order line item level,then you’ll have to use either a COUNTD to count the distinct regions, or some approach to specify what it is you want Tableau to count.
For example, put your set on the filter shelf, and show COUNTD(Region) which could be slow for very large data sets. To get the same effect without an explicit filter, you can define a LOD calculation such as:
{ COUNTD(if [My Favorite Regions] then [Region] end) }
Or you could use a table calc with the SIZE() function to do the calculation in the Tableau client instead of by the data source.
Not sure what your data looks like but you could set a certain condition when creating a set or split the IN/OUT into two different sets.
Here's a link to sets in Tableau.
You can do this with an if statement
IF [set] = TRUE THEN 1 ELSE 0 END
Then I suppose you could sum this calculated field
The most common usage is when you have a lot of categories and want to create an 'Other' category based on the categories that aren't in a set, if the set is a "Top N Set"
To do this:
IF [set] = TRUE THEN [dimension] ELSE 'Others' END
I am new to using Tableau.I want to count the number of times each genre appears in the data set.
In the data set(image attached), I have several genres for one show. I want to count the number of each genre in the data set and display it in Tableau
If you have access to database, then take the dump of data in a excel.
Split the data by , and then create a individual column for every word in the genre column.
Now take the excel as source to tableau, In tableau pivot the splitted columns of Genre.
Go to sheet in tableau, Place the pivot field values in rows and count of pivot field values as measures.
You should be able to see the desired result.
This can be done by an alternative method if you know the distinct list of all genre.
what you need to do is to create a separate calculative field for each Genre using
if contains(Genre,'action') then 1 else 0 end
and then use the Sum of these field as the count of Series per genre.
I know this is a hideous task but, it can be done if you do not have any other option.
Either I am the first person to ever need to display percentages in Tableau or I do not know what to search for! I highly suspect it is the latter...
I believe what I am attempting to ask is how to make a calculated non-aggregated field by dividing by an aggregated number. Although I would prefer just to be able to display the percentages instead of a whole number.
This is how I would do it in Excel:
The data that already exists is Column A and B. In Tableau these would be non-aggregated. What I need to do in Tableau is to generate what is column C (also non-aggregated) because it does not exist in my data. In excel, all I did to get the aggregate number (total) of column B was:
sum(B1:B4)
And for the column C:
=B1/$B$5
But I can't seem to do this at all in Tableau. When I try to use the same syntax, I get an error message: "Cannot mix aggregate and non-aggregate arguments with this function."
Instead of having a calculated field, you can use a Quick Table Calculation on the column.
Right-click the pill of your data > Quick Table Calculation > Percent of Total. This will show the percentages instead. If you want to keep both, just duplicate column b first and then add the table calculation to the new column.
I'm trying to build a report which basically reports the number of closed incidents that a property has done in a given month then divide it by the number of beds in that property.
The number of incidents is calculated from the incidents table based on the month and the property then the number of rooms is obviously static per property.
The tables that I have a:
Incident: No_ which is the ID, PropertyID, Created_DateTime, Closed_DateTime, Status.
Property: ID, Name, No_of_Rooms
I tried this code in a calculated field but it errors saying that you can't use an aggregated column, which I thought it might:
=Sum(Fields!No_.Value, "Incidents")/Fields!No_of_Rooms.Value
I'm sure this will be simple but I can't find what to search to find the answer.
If this on the 'Details' level of the report and is commonly the lowest level. You may want this instead:
=(Fields!No_.Value / Fields!No_of_Rooms.Value)
If it is on a parent group I am guessing you just are listing a single instance and it wants an aggregate. In that case:
= (Sum(fields!No_.Value) / Sum(Fields!No_of_Rooms.Value))
This would perform aggregation on an aggregation. You do not need to do this (Fields!(thing).Value, "DataSet") if everything is in the same Dataset, if not then you do. Generally if are in the table or object that your dataset is referencing it knows that part implicitly without being listed.
Your formula will work but only if placed in the tablix but for performance this should be calculated in the query if possible.