Comments on: Chart An Equation

By: Matt

Matt — Tue, 29 Sep 2009 15:27:00 +0000

I need some help with the equation of an arc. I want it to be part of a perfect circle in the +/+ quadrant. It should start at 0, 10 and go down to 10, 0. Can someone help me out with the equation for that?

Thanks!

By: dion

dion — Thu, 18 Oct 2007 08:11:00 +0000

Looks like it does'nt work for user defined functions. Is that so?

Dion

By: jkpieterse

jkpieterse — Mon, 02 May 2005 10:24:00 +0000

For me the workbook works in Excel 2003 after hitting F2, enter on the cell that holds the equation to be plotted. Earlier versions don’t seem to need this.

By: Rob van Gelder

Rob van Gelder — Mon, 02 May 2005 10:10:00 +0000

Hi.

Neither yours or Stephen's works for me > XL2003

Suspecting the odd looking EVALUATE function, I tried my own: =EVALUATE("1+1?)

Excel complains: "That function is not valid."

Oddly I got Stephen's wkb to graph somehow by opening a combination of other workbooks in the background. I couldn't reproduce the behaviour.

By: jkpieterse

jkpieterse — Mon, 02 May 2005 09:52:00 +0000

Hi Stephen,

I have added a link to your ancient example.
I guess my pages are an explanation of how you did it, even if I didn't use yours at first.

I've also done some heavy editing on the article, because the order in which things need to be done is very important to get this working.

By: jkpieterse

jkpieterse — Mon, 02 May 2005 07:16:00 +0000

Hi Stephen,

Duh.

I must admit I never even looked at your version.
I will and refer to it as well. It might explain how I got the idea, but I had forgotten where I had seen it.

About the x'es. I started off using just x and at first couldn't get it to work when I tried putting it in the SERIES formula. Then I changed two things simultaniously: the formula I used and replacing x with xValues. The two changes seemed to work, so I didn't look back . Thanks for the comments.

What still doesn't seem to work is using Excel functions in the first place: sin(x) gives all the same values so it seems. Any ideas?

By: Stephen Bullen

Stephen Bullen — Sun, 01 May 2005 21:41:00 +0000

Hi Jan Karel

(a) I was just wondering how that differs from my ChtFrmla example? If you’re just explaining how it works, some accreditation would be nice

(b) Because you’re defined name is substituting ‘x’ for your ‘xValues’ defined names in the formula, it means the technique won’t work for any function that contains the letter x, such as EXP(). If instead of using the name ‘xValues’, you use the name ‘x’, you don’t need the SUBSTITUTE(), and it works for all formulas.

Regards

Stephen Bullen

By: doco

doco — Sun, 01 May 2005 19:19:00 +0000

OK, I get to be chump again … ROW(…) is the key = it returns the row number – go figure :rolleyes: Boy is this embarrasing. What a boneheaded chump!

By: doco

doco — Sun, 01 May 2005 19:15:00 +0000

Interesting: when using named range xValues = ROW(1:20) in range selected A1:A25 for instance, the numbering goes to 21 not the expected 20; with 22 - 25 showing #N/A. Same thing happens for any given ROW(N:N), the actual return is one more than expected...

Any explanations?