Hello All,

I am trying to build a model in R. I am facing the following problem...

My Data Frame contains the following data...

Date                                Value
08/01/2013                        100
08/02/2013                         100.5
08/03/2013                         102
....

Now I want to add a column to this data frame where New Column Value =
Difference of two subsequent observations. For Eg. on 08/02/2013 the new
value = 100.5 - 100=0.5

I want to do this dynamically such that if I change the value in Value
column the new column should recalculate automatically.

Is there a way to do this in R?

Regards,
Ankur Seth

	[[alternative HTML version deleted]]

