------ I have 4 columns : <---------

COLUMN A: Dates (ex. 1/15/2009)
COLUMN B: Time (ex. 1:35:24 AM)
COLUMN C: Dates and Time added and shown in the format €� dd/mm/yyyy hh/mm "
and converted to a number gives: (ex. 40035.01 ) this would be the "X-axis
data"
COLUMN D: " Y-Axis Data "

----- Excell sheet "1" <------

A B C D
1/15/2009 1:35:24 AM 40035.01 1234
1/15/2009 2:15:20 AM 40035.11 2345
1/15/2009 3:24:31 AM 40035.26 2456
1/16/2009 1:15:20 AM 40036.01 3456
1/16/2009 7:30:23 AM 40036.13 4567
1/17/2009 9:24:23 AM 40037.19 5678
1/18/2009 3:35:23 AM 40038.25 6789
1/19/2009 3:37:23 AM 40039.25 6789

------------ Excel sheet "2" <----------
I want to create an array that automatically takes the values that
correspond from the date 1/16/2009 to 1/18/2009 and give me the slopes from
the values located on "COLUMN D (Y-axis )" and " COLUMN C (X- axis )" from
the desire range of dates.



I Tried the following:

--------- worksheet "2" <-----------
Cell A1: 1/16/2009
Cell A2: 1/18/2009

Using as range A1 to A2 (1/16/2009, 1/17/2009, 1/18/2009)

Cell €œB2€� :
=Slope(IF(ISNUMBER(MATCH(1!$C$5:$C$45000,2!A1:A2,0 )),1!$d$5:$d$45000))

That function is the one I am trying to use but it doesn't work, maybe the
slope can not be combined with other functions, but to be honest I do not
know how to do it.

Thanks! I hope someone can help..... ????????

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