[R] data and parameters

[jim holtman]

forgot the control parameters:

> sqldf("
+     select m.*, c.control_params
+         from master m, control c
+         where m.clientId = c.clientID
+             and m.date between c.mindate and c.maxdate
+     ")
  clientId date value control_params
1        2 1002 10002              1
2        2 1005 10005              1
>


On Thu, Jan 20, 2011 at 9:02 PM, analyst41 at hotmail.com
<analyst41 at hotmail.com> wrote:
> (1) I have a master data frame that reads
>
> ClientID |date |value
>
> (2) I also have a control data frame that reads
>
> Client ID| Min date| Max date| control parameters
>
> The control data set may not have all client IDs .
>
> I want to use the control data frame on the master data frame to
> remove client IDS that don't exist in the control data set and for
> those that do, remove dates outside the required range.
>
> (3) We can either put the control parameters on all rows corresponding
> to a client ID or look it up from the control data frame
>
> (4) The basic function call looks like
>
> do.something(df,control parameters)
>
> where df is the subset of the master data set that corresponds to a
> single client with unwanted dates removed and the control parameters
> pertain to that client.
>
> Any help would be appreciated.
>
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>



-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?