[Eraserboy9915]

I have three columns in Numbers (Column H, J, and R). Columns R is an exact copy of Column H.
Every time a certain value appears in Column H, I need the corresponding value in Column R (but not Column H) in the same row to become negative.
Now, I have over 100k rows that I am working with, so manually changing seems to be out of the question.
How exactly can I do this?

[WendyM]

Hi Eraserboy, welcome to TSG.

You don't say what program you're using, but I assume Excel? If so, you can use an if formula. You don't say what value you need to find in column H, but I'll use 5 as the example. You'd put this formula in R1 and drag it down the rest of the column.

=IF(H1=5,-5,H1)

The formula says "if the value in H1 is 5, then make R1 = -5. If not, make it the same as H1". Replace the 5 and -5 with whatever value you need.

Hope that helps.

[Eraserboy9915]

Thanks for the Response Wendy.
I'm using the program Numbers on a Mac. I see what you're saying, but I don't want to change the value of the number in column R to the number in column H. I just want to make the value already in R negative if column H has a value of "SD" present. Would the same concept apply in this case? If so, could you please explain a bit more.

[WendyM]

Oh, sorry, I didn't realize Numbers was a program.

When you said that Column R was an exact copy of Column H, I assumed they had the same values. If the values are different, it's probably easiest to use a helper column. You can insert a column next to R and use:

=IF(H1="SD",-R1,R1)

Then you can hide Column R so that you only see the numbers in Column S. Does that make sense?