How can I connect dots across missing data points in a line chart?

Hi all!
I have a table in Numbers that I update every few days with a new value for the current date (in this case body metrics like weight, etc.), which looks something like this:
Column 1              Column 2      Column 3
Aug 16, 2011         87.1             15.4
Aug 17, 2011         86.6
Aug 18, 2011         86.1
Aug 19, 2011
Aug 20, 2011         85.7             14.6
Aug 21, 2011         85.3
Every once in a while there will be a missing value for a given date (because I didn't take a reading on that day). When I plot each column against the date on a line chart, there is a gap where there are missing data points. The line does not connect "across" missing data points. Is there a way to make the line connect across missing data points?
Thanks for any help. This thing has been driving me nuts!

Leave your nuts in peace.
Don't use line charts but scatter charts.
These ones are able to do the trick.
Of course to do that you must study a bit of Numbers User Guide.
In column D of the Main table, the formula is :
=IF(ISBLANK($B),99999,ROW())
In column E of the Main table, the formula is :
=IF(ISBLANK($C),99999,ROW())
Now I describe the table charter.
In column A, the formula is :
=IFERROR(DAY(OFFSET(Main :: $A$1,SMALL(Main :: $D,ROW())-1,0)),"")
In column B,the formula is :
=IFERROR(OFFSET(Main :: $A$1,SMALL(Main :: $D,ROW())-1,1),"")
In column C, the formula is :
=IFERROR(DAY(OFFSET(Main :: $A$1,SMALL(Main :: $E,ROW())-1,0)),"")
In column D, the formula is :
=IFERROR(OFFSET(Main :: $A$1,SMALL(Main :: $E,ROW())-1,2),"")
In this table, select the range A1 … D5
and ask for a Scatter chart.
You will get what you need.
I asked that points are joined by curves
I just edited the parameters of Xaxis and Yaxis to get a cleaner look.
I repeat one more time that knowing what is written in the User Guides is useful to be able to solve problems with no obvious answer.
Yvan KOENIG (VALLAURIS, France) samedi 27 août 2011 15:59:20
iMac 21”5, i7, 2.8 GHz, 4 Gbytes, 1 Tbytes, mac OS X 10.6.8 and 10.7.0
My iDisk is : <http://public.me.com/koenigyvan>
Please : Search for questions similar to your own before submitting them to the community
To be the AW6 successor, iWork MUST integrate a TRUE DB, not a list organizer !

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