Highlight duplicates based on first name and last name - google-sheets

There are plenty of tutorials on how to conditionally format duplicates in a column, but how can I do this across two key columns without creating a third 'combo' column?
Edit: This formula gets me close:
=countifs(A:A,A1, B:B, B1)>1
But it only applies the formatting to column A when using A1:B2501 as the range

Using my formula
=countifs(A:A,A1, B:B, B1)>1
works as long as I create two rules, one for each column

Related

Unique Filter multiple sheets with ArrayFormula

I have no idea how to title this post, apologize in advance.
I have several sheets with a number in Column I and a name centered and merged in columns A:H. I want to obtain the name from A:H of the corresponding value within I but do have duplicates, therefore I need the nth value when permitted. The formula I have so far works up to the point it does not autofill down as an ArrayFormula, so when I drag the formula down I get an #REF! error due to the fact that when a duplicate is found it cannot overwrite the formula below.
This will be easier to showcase: LINK TO SHEET.
Essentially, in the main sheet all the values in I:I of all the other sheets are obtained and sorted, then using that column I want to return the name that corresponds to the value, allowing for duplicates to work themselves out. I believe my issues resides in the $B1 part at the end of the formula preventing it from being an array.
=ARRAYFORMULA(UNIQUE(FILTER({Sheet2!$A$1:$A;Sheet3!$A$1:$A;Sheet4!$A$1:$A},{Sheet2!$I$1:$I;Sheet3!$I$1:$I;Sheet4!$I$1:$I}=$B1)))
Cell F2 on the Sheet1 tab:
=QUERY({Sheet2!A:I;Sheet3!A:I;Sheet4!A:I},"select Col1,Col9 where Col9>0 order by Col9 asc",0)
You can read more about query here.

Google sheets: How to write a formula that performs a sum from column_x until previous column and apply it to the rest of the columns

I have these two columns:
For the next columns I would to apply this formula:
SUM[all_previous_columns]
I would like to write it once for the third column and apply it for the rest of the columns.
Any idea how to do this?
You mean this?
You should use absolute addressing to first column in the range you want to sum and relative addressing to last column. Then you can drag your formula right as far as you want.
As it just doubles each time, you could also write it as an array formula:
=ArrayFormula((A1+B1)*2^(column(C1:1)-3))

How to use AVERAGEIF in Google Sheets, only addressing columns with a specific text

In Google Sheets, I'm trying to use AVERAGEIF to calculate an average of only some of the columns in another table.
The columns to be included in the average are marked by some text in a specific cell (e.g. the first or last row of that column).
Some columns are to be included in several averages, so the text in the top\bottom row would include several words (effectively meaning I'll need some sort of substring check such as FIND).
I've tried using AVERAGEIF() in conjuction with FIND() but couldn't get this to work.
Any ideas?
Here is an example of how the data sheet looks like, and how I would expect it to work
You can use following formula:
=ARRAYFORMULA(AVERAGE(IF(ISNUMBER(SEARCH(D2,A2:A9)),B2:B9,"")))
Edit:
For table mentioned in comment you must change ranges:
=ARRAYFORMULA(AVERAGE(IF(ISNUMBER(SEARCH(E2,$A$1:$C$1)),$A$2:$C$4,"")))
You can use a query
=AVERAGE(QUERY(TRANSPOSE($A$1:$D),"where Col1 contains '"&D1&"'"))
Functions used:
AVERAGE
QUERY
TRANSPOSE

How to apply arrayformula to a series of columns

I'm trying to make a spreadsheet to track membership for an organization.
Basically my design is an input sheet with columns of names associated with expiration dates, then another sheet that collects all the unique names and all of their associated expiration dates, and then one last sheet that filters the names into only those with expiration dates in the future.
I am able to collect all the unique names into one column using an arrayformula, but I am stuck trying to do a lookup operation of some kind that, for each name, will look for the name in each column and if it appears then it will add the associated expiration date to it's list (and otherwise add a blank cell, and then I can filter out the blank cells).
Is there a way to use vlookup or anything else in an arrayformula to do a series of operations for all columns in a range? Also, I want to use arrayformula because I want the formula to be infinite so the spreadsheet can keep growing. I've tried using
=ARRAYFORMULA(IF(ISERROR(VLOOKUP(A1:A,Sheet1!A2:200,1,FALSE)),,Sheet1!A1:1))
But vlookup, and anything else I tried like match, interprets Sheet1!A2:200 as a single range and performs a lookup only in the first column and does not do a separate lookup in each column.
For example, I might have this input on Sheet1
And want this result on another sheet
I suspect the combination of what you would really like and what is reasonably practical is a script but the following is an array formula, though would be cumbersome to extend and does require copying down (from B1):
=split(if(ISERROR(match(A1,Sheet1!A:A,0)),"",Sheet1!A$1)&"|"&if(ISERROR(match(A1,Sheet1!B:B,0)),"",Sheet1!B$1)&"|"&if(ISERROR(match(A1,Sheet1!C:C,0)),"",Sheet1!C$1),"|")
Assumes a unique list of names in ColumnA, such as created by:
=unique(QUERY({Sheet1!A2:A6;Sheet1!B2:B6;Sheet1!C2:C6},"where Col1 is not NULL"))
in A1.

Is it possible to set a default value of zero when using COUNTA function in Google Sheets?

I'm using a pivot table in a Google Spreadsheet that counts the occurrences of different types of event-types on given dates. The events are listed on one sheet, with a column for "Date" and column for "Type." Based on this a Pivot Table is produced.
The trouble is that for dates when an event-type is non-existent, COUNTA returns empty. I'd rather it return 0.
The reason is for charting and statistical purposes when you create a chart from this data, it interpolates between values, ignoring empty cells. I'd prefer that it display zero on the chart on the days when these event types don't exist...
Is this possible?
UPD: sorry, I've misunderstood what you need.
What if, on another worksheet, you write the following?
=arrayformula(IF('PivotSheetName'!A1:Z100="";0;'PivotSheetName'!A1:Z100))
(This formula makes a copy of your Pivot table on the new worksheet,
replacing empty cells with 0; moreover, the control elements of the
pivot table are copied to the new worksheet as well)

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