How do I populate unique cells from one worksheet to another based on a reference field?

[edmund1985]

Hi all,

I'm trying to come up with a formula that will populate unique cells in a new worksheet by referencing another worksheet that contains all the data.

So far I've used an INDEX MATCH formula, but that takes across all cells and displays the contents of the desired ones, while producing #N/A for the others.

Example

The data set looks something like this:

Unique ID	Colour
101	White
102	White
103	Red
104	White
105	Red
106	White

<tbody>
</tbody>

The formula I'm using is below:
=INDEX('Sheet1'!A2,MATCH("White",'Sheet1'!B2,0))

And the result in Sheet 2 looks like this:

Unique ID

101

102

#N/A

104

#N/A

106

<tbody>
</tbody>

I'd like if the '#N/A' cells weren't returned at all, i.e. for it to look like this:

Unique ID

101

102

104

106

<tbody>
</tbody>

Does anyone know if that's possible?? Thanks in advance for any help!!!

 

[wideboydixon]

This seems to be a popular question; I see it many times per day

Book1
	A	B	C	D	E
1	Unique ID	Colour		Unique ID	Colour
2	101	White		101	White
3	102	White		102
4	103	Red		104
5	104	White		106
6	105	Red
7	106	White
Sheet1

Cell Formulas
Range	Formula
D2	{=IFERROR(INDEX($A$2:$A$7,SMALL(IF($B$2:$B$7=$E$2,ROW($B$2:$B$7)-ROW($B$1)),ROW()-1)), "")}
Press CTRL+SHIFT+ENTER to enter array formulas.

WBD

 

[edmund1985]

Hi WBD,

Thanks for taking a look at it. I tried using your formula but it's producing blank cells unfortunately... I removed the IFERROR function to get a better idea of what's happening and it's giving me #VALUE!

Is there another way of doing it?? Maybe with different formula combinations?

Thanks!
Ed

 

[wideboydixon]

Well, you'll need to change the cell references etc.

{=IFERROR(INDEX($A$2:$A$7,SMALL(IF($B$2:$B$7=$E$2,ROW($B$2:$B$7)-ROW($B$1)),ROW()-1)), "")}

$A$2:$A$7 : Specifies all the values in the Unique ID column
$B$2:$B$7 : Specifies all the values in the Colour column
$E$2 : Specifies the cell that contains the criteria or you could hard-code this to "White"
$B$1 : Specifies the Colour header cell (i.e. the one that contains "Colour")
ROW()-1 : This is the tricky one. My first value was in D2 so this returns the values 1,2,3,4,5 etc. You might need to change this to return 1 in the first cell you put the formula

WBD

 

[edmund1985]

Hi WBD,

I actually got it to work perfectly with the simple example I gave

It's given me a few correct results for my actual dataset, although it's missed out certain records sequentially and then at random from various places in the column

I should mention that my actual dataset is over 7500 entries long, and the actual unique ID field values are more like:

412361863-1
412568432-1
412568432-2
412357123-1
420535415-1
420957135-1
420957135-2
420957135-3
412693515-1
etc.

<tbody>
</tbody>

Could that be affecting it??