How do you count the number of unique values?

I wanted to know how to create a function that will tell me how many unique values are in a list of values.
For example if I had this list:
15
15
12
12
12
2
1
I would get a result of 4. Because there are only 4 unique values 15, 12, 2, and 1.
I'm trying to create a spreadsheet that modeled the Sainte-Laguë method of voting; in case you're wondering. I'm using Numbers '09 if it matters.
Thanks

Thanks for the responses. That was fast.
I was hoping to fit it all in one cell, but I guess I could hide the columns used for calculation. I tried Badunit's Function and it works. However I found that if I have a column of all the same number it will return 0, when in fact it should return 1. Like if I had a column of 14s I should get one, because the number of different values that appears is 1. Also a minor note is that COUNTIF(B$2:B2,B2) should be COUNTIF(B2:B$2,B2), that makes sure that if you have anything below it doesn't interfere. At least that's what made it work for me.
Well I looked at the way you did your chart, Badunit, and it makes more sense than the way I was doing it. I was having to manually enter the number of seats every new row. I think it would have been easier to write a java program.
Anyways you guys have been helpful. Thanks again.

Similar Messages

How can I count the number of unique cells?

I have a column in my spreadsheet that looks like this:
Date
Items
3/25
Item A
3/27
Item A
3/29
Item A
3/25
Item A
4/25
Item B
6/1
Item B
7/13
Item B
8/9
Item B
3/5
Item C
1/2
Item C
5/15
Item D
3/25
Item D
What I want is something that will list all the unique items that I have and count the number of times that Item shows up in my spreadsheet. For example, the results should look like this:
Item A: 3
Item B: 4
Item C: 2
Item D: 2
I thought for sure that I can do a chart in numbers and it would count the number of items but no, not so much.

I apologize. When I pasted the table in Numbers running in French the values of column B were treated as dates.
I leave the screenshot untouched because the contents of this column changes nothing to the calculations.
In cell D2 of the main table, the formula is :
=IF(ISBLANK(C),0,IF(COUNTIF($C$2:$C2,"="&$C2)=1,COUNTIF(C,"="&$C2)+(ROWS(A)-ROW( ))/100000,0))
Apply Fill Down
In cell A2 of table aux, the formula is :
=IFERROR(LARGE(main :: D,ROW()-1),"")
In cell B2 of table aux, the formula is :
=IF(A>0,LOOKUP(A2,main :: D,main :: C),"")
In cell C2 of table aux, the formula is :
=INT(A)
Apply Fill Down
Yvan KOENIG (VALLAURIS, France) samedi 6 août 2011 23:33:10
iMac 21”5, i7, 2.8 GHz, 4 Gbytes, 1 Tbytes, mac OS X 10.6.8 and 10.7.0
My iDisk is : <http://public.me.com/koenigyvan>
Please : Search for questions similar to your own before submitting them to the community
To be the AW6 successor, iWork MUST integrate a TRUE DB, not a list organizer !

Count the number of unique values in column

Hi
I have a large numbers file (thousands of rows) with data for different dates. I need to calculate the number of unique (distinct) dates are in the spreadsheet.
Does anyone know how to do this?
Thanks,
Bruce

bpj,
Let's say your date is in column B for this example and your first data row is Row 2. In another column you can enter into row 2: =IF(COUNTIF($B$2:B2, B)=1, 1, "") Summing the new column content will yield the number if unique dates.
As badunit observes, this will result in sluggish document. If the number of possible dates is small compared to the number of rows of data, it would be better to make a table of possible dates and count the number of occurrences of each of those dates in the data, a COUNTIF function on the frequency data for the date range will give you the number of unique dates, possible much more efficiently.
Jerry

How do you return the number of Rows in a ResultSet??

How do you return the number of Rows in a ResultSet? It's easy enough to do in the SQL query using COUNT(*) but surely JDBC provides a method to return the number of rows.
The ResultSetMetaData interface provides a method for counting the number of columns but nothing for the rows.
Thanks

No good way before JDBC2.0. u can use JDBC2.0 CachedRowSet.size() to retrieve the number of rows got by a ResultSet.

How do you count the multiple columns of a field in a table

How do you count the multiple columns of a field in a table

Hi,
4396bf34-e890-4202-a6b0-4e08c9ff0e89 wrote:
How do you count the multiple columns of a field in a table
Whenever you have a problem, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all tables involved, and also post the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say which version of Oracle you're using (e.g., 11.2.0.2.0).
See the forum FAQ: https://forums.oracle.com/message/9362002
"Field" isn't a standard database term. Some people say "field" when they mean "column", but I don't think that's what you mean ("How do you count the multiple columns of a column .."). Do you want to know how many times a column is used (as opposed to NULL), or the number of different values in a column? You really need to show what you want.

How do I count the number of records returned in the CMIS query

How do I count the number of records returned in the query CMIS?
SELECT COUNT(*) FROM ora:t:IDC:GlobalProfile WHERE ora:p:xRegionDefinition = \'RD_PROJETOS_EXCLUSIVOS\''}
Euler Homero

Hi Euler,
interestingly enough, the reference guide for CMIS ( http://wiki.alfresco.com/wiki/CMIS_Query_Language ) that I found does not mention the COUNT function at all. On the other hand it states that: "The SELECT clause identifies which virtual columns to return in the result set. It can be either a comma-separated list of one or more queryNames of properties that are defined by queryable object types or * for all virtual columns."
There are, however, some other posts like e.g. http://alfrescoshare.wordpress.com/2010/01/20/count-the-total-number-of-documents-in-alfresco-using-sql/ which state that they could make it working.
Having asked in the WebCenter Portal forum, I assume that your content repository is WebCenter Content. The CMIS doc for the Content is available here: http://docs.oracle.com/cd/E23943_01/doc.1111/e15813.pdf (no COUNT there either). It does, however, mention explicitly that "CMIS queries return a Result Set where each Entry object will contain only the properties that were specified in the query.". This means your could rather investigate the Result Set. Note that there are also other means than CMIS how to get the requested result set (e.g. calling a search service directly via so-called RIDC).
In the given context I am also interested what your use case is. OOTB CMIS in WebCenter Portal is used, for instance, in Content Presenter, where it is content rather than "parameters" what's displayed.

How do you show the number of days per month?

How do you show the number of days per month?
I am working on a budget. I want to know how much to amortize each month to fund an investment. Income comes monthly, but expenses leave in days, or weeks. The number of days and weeks in months vary.
I want to figure out income and expenses per day, per month and per year, so I know how much can be invested each month, week or day. For a start I would like a formula that shows how many days are in each month?

thanks..
I solve my problem as
public class MyExample {
    public static void main(String a[]) {
        String stdate = "2009-03-01";
        java.sql.Date currentDate = new java.sql.Date(System.currentTimeMillis());
        java.sql.Date preDate = java.sql.Date.valueOf(stdate);
        System.out.println(currentDate);
        System.out.println(preDate);
//        int dateCom = preDate.compareTo(currentDate);
//        System.out.println(dateCom);
        long diff = currentDate.getTime() - preDate.getTime();
        int days = (int) Math.floor(diff / (24 * 60 * 60 * 1000));
         System.out.println(days);
}

How do you set the number of rows in a spreadsheet, so that even when you drag data in, in writes over those rows instead of adding a new row?

How do you set the number of rows you want in a spreadsheet, so that even when you drag data in, in writes over those rows instead of adding a new row?

After the discovery reported above, I filed this report :
Bug ID# 10073038
Summary:
When Numbers is used on a system with decimal comma a csv file may be good AND wrong
Steps to Reproduce:
With Numbers v2, you introduced an interesting enhancement.
In system using the comma as decimal separator, Numbers requires csv files using the semi-colon as values delimiter.
In fact it’s true if we OPEN the document dragging its icon on Numbers one or thru the open dialog.
This said.
(1) Drag and drop a csv built with the 'semi-colon' standard on a table or on a sheet
(2) Drag and drop a csv built with the 'comma' standard on a table or on a sheet
Expected Results:
Every normally constituted user assume that in
case (1) he will get a perfectly built table
case (2) he will get every cells of a row in a single cell
Actual Results:
In fact you forgot the drag and drop way of use and in
case (1) every values separated by semi-colon are inserted in a single cell
case (2) values separated by comma are correctly spread in a table
isn’t it ridiculous ?
Regression:
Except looking in QuickView to see which is exactly the structure of the file to decide the way we will insert it in a Numbers document, we may use an applescript fair enough to replace the semi-colons by TAB characters
or
to replace the commas by TABs and the decimal periods by commas
Notes:
While I am on this subject, I wish to make two proposals:
(1) It would be fine to format the date according to the ISO format year-mm-dd when you export a Numbers doc to csv.
Doing that, dates would be imported correctly in every countries.
At this time, on an English system, you export as mm/dd/year.
If the doc is open on a system using the format dd/mm/year, the results will be odd.
On a system using the format dd/mm/year, you export this way and so, if the doc is open on a system using the format mm/dd/year the results are odd too.
As every localized versions accept the ISO format (at least on entry), using it in the export scheme would give a correct behavior everywhere.
(2) It would be fine to add the format Tab Separated Values in the Export pane.
TSV + ISO date format would give documents opening flawlessly everywhere.
Yvan KOENIG (VALLAURIS, France) dimanche 4 septembre 2011 21:27:41
iMac 21”5, i7, 2.8 GHz, 4 Gbytes, 1 Tbytes, mac OS X 10.6.8 and 10.7.0
My iDisk is : <http://public.me.com/koenigyvan>
Please : Search for questions similar to your own before submitting them to the community

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