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Posted on 2011-09-30

I don't really understand how the meat of this macro works but it does work up to a point (or should I say down to a point). If the last non-zero value in Row 4 is in Y4, it selects Y4. If the last non-zero value is in R4, it selects R4. But if the last non-zero value is in Q4 or P4, etc., it continues to select R4.

Can you see anything here that would cause that? Or is there a better way to accomplish my goal anyway? Row 4 consists of formulas, most of which return nothing. Otherwise of course I could use a simple [IV4].end(xlToLeft).

Thanks,

John

Can you see anything here that would cause that? Or is there a better way to accomplish my goal anyway? Row 4 consists of formulas, most of which return nothing. Otherwise of course I could use a simple [IV4].end(xlToLeft).

Thanks,

John

```
Sub FindLastNonZero()
Dim leftmost As Range
Dim str As String
str = "MAX(COLUMN(4:4)*(4:4<>0))"
Set leftmost = Cells(4, Evaluate(str))
leftmost.Select
Exit Sub
```

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3 Comments

The (4:4<>0) creates a list of TRUE and FALSE values for every cell in row 4, TRUE if the cell <> zero and FALSE if the cell = zero.

These two arrays are multiplied together and the results is a list with a bunch of zeros and some numbers. The zeros are the results of a FALSE being multiplied with a column number. The numbers are the result of a TRUE being multiplied with a column number. This is because of the principle of coercion. Excel "coerces" TRUE's and FALSE's into 1's and 0's when performing arithmetic operations.

Lastly, the MAX function finds the largest value in the list of zeros and other numbers. The largest number is the column number that did not get killed with a FALSE. This number happens to be column containing the last non-zero value.

Now, as to why it won't work for you. I can't help with that. It works just fine for me both in VBA and as an array formula, see attached workbook. Maybe you have some corruption going on. Have you tried the code in a new sample workbook?

Kyle

Q-27375035-RevA.xlsm

Are you implying that Row 4 has formulas which return the "" empty string as nothing, or 0 as nothing. If its returning the empty string, then a valid result would be the rightmost column being the empty string if there's nothing else to the right of it, because the empty string does not equal zero.

Looking at your other posts, I'm assuming that Excel 2007+ is your version. Some of my spreadsheet examples use IFERROR() function, so if you're using 2003, let me know and I can give you a stand-in for that.

Comments:

That could be why you're getting a failure. See EXAMPLE #1 in the attached, where formulas return numbers and also empty strings. Note the RightMost column identified is demonstrated with this formula on sheet 1.

Now, if you want the farmost right address with empty string evaluated as a non option (as with the zero), then we have to do a bit more. Originally, when we worked on this, the assumption was that there'd always be a number as a result of the formula, but I'm stretching here and empty string is one way you'd be getting erroneous results, so I'm going on that assumption.

The formula we'd need, which can be used as your new general purpose "farmost right" formula would be:

if testing on row 16, which I am in EXAMPLE #2. Note the test for non-empty string in addition to non-zero

MAX(COLUMN(16:16)*(16:16<>

One could have just as easily tested for ABS(16:16)>0 in which case, any non-zero number is being tested for, as opposed to testing for the negative. But, this would not work if you wanted the farmost right cell on data that contained string/text output.

See example #3 in the attached for this example, using this formula:

MAX(COLUMN(22:22)*(IFERROR

For all these examples, keep hitting F9 for the random generated output to show different results, and you can see the successful pickup on the farmost right, based on that formula's definition of farmost right!

I updated your macro around the two negative tests (arbitrarily, and I would have picked that to start, and it also supports strings in the cells, in addition to numbers. The ABS alternative came out as another alternative just to keep the creative juices flowing and to help with understanding - but it will only work if your range has numeric output...

Here's the code, and I have a button on that code (SEE TEST MACRO TAB), keep hitting it (I put a calc in to generate output...) so you can see it select the correct cell, as well!

```
Sub FindLastNonZero()
Dim leftmost As Range
Dim str As String
Dim resultCol As Long
Application.Calculate 'only inserted for demo purposes
str = "MAX(COLUMN(4:4)*(4:4<>0)*(4:4<>""""))"
resultCol = Evaluate(str)
If resultCol = 0 Then 'avoid getting an error
Set leftmost = Cells(4, 1) 'just make it column A - or do what you need to do with this case
Else
Set leftmost = Cells(4, Evaluate(str))
End If
leftmost.Select
End Sub
```

See attached,

Enjoy!

Dave

farmostRightCell-r2.xlsm

And kqerb, great education, very easy to understand. So I want to award you some points too.

Thanks,

John

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