Calculating a pattern in series data?

[hrithik]

I have 3 columns of the following type:

<TABLE style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; BORDER-COLLAPSE: collapse; DIRECTION: ltr; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid" border=1 cellSpacing=0 cellPadding=0 valign="top"><TBODY><TR><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.747in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">PREV YR
</TD><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.667in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">YR
</TD><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.697in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">Proj YR
</TD></TR><TR><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.747in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">

2004​

</TD><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.667in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">

2007​

</TD><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.697in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">

2010​

</TD></TR><TR><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.747in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">

2004​

</TD><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.667in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">

2008​

</TD><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.697in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">

2012​

</TD></TR><TR><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.747in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">
</TD><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.667in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">

2007​

</TD><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.697in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">
</TD></TR><TR><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.747in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">

2007​

</TD><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.667in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">

2010​

</TD><TD style="BORDER-BOTTOM: #a3a3a3 1pt solid; BORDER-LEFT: #a3a3a3 1pt solid; PADDING-BOTTOM: 4pt; PADDING-LEFT: 4pt; WIDTH: 0.697in; PADDING-RIGHT: 4pt; VERTICAL-ALIGN: top; BORDER-TOP: #a3a3a3 1pt solid; BORDER-RIGHT: #a3a3a3 1pt solid; PADDING-TOP: 4pt">

2013​

</TD></TR></TBODY></TABLE>

I need a formula to calculate the cycle (if there is any)
If (YR -PREV YR) = (Proj YR - YR) then CYCLE = (Proj YR - YR)
Else cycle should be blank (row 4 in the above table for example.

for row 1 cycle = 3

Please help!

 

[Andrew Poulsom]

That's:

=IF((B2-A2)=(C2-B2),C2-B2,"")

 

[hrithik]

I'm looking for a MATH or Statistical formula for this

 

[Andrew Poulsom]

I'm looking for a MATH or Statistical formula for this

What do you mean? Didn't the formula I posted work for you?

 

[hrithik]

What do you mean? Didn't the formula I posted work for you?

it should work...i have the same formula

I'm looking for an excel function that gives me the same result.

Like TREND() returns the next data in a series, I need a function that looks at a series and gives back the constant difference between consecutive data of the series.