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Hi everybody
1) could you add a button "resample= @all " beside sample in the workfile to make easy to resample the data when i use "smpl date1 date2".
2) make "select all" when i clic in the right mouse, to select all proram (i can use CTRL+A).
3) make restore button or by right clic in mouse to restore defaut graph, (when i zoom in the graph i can not restore defaut graph !!!!!).
4) make function for differenced lag "@dlag(x,n1,n2, [s])" "x= series, n1=the start of d(x(n1)) , n2= the arrival of d(x(n2)), s=smpl", if i would have two diff laged variables i will put n1=1 and n2=2.
four mini suggestions.

I do not understand 3) and 4)

I think the answer to 3 is hit the ESC key. I don't understand 4 either.

3-Great!
4-generate multi series differenced lag:
n1=represent the first number (order) that the series to be laged, and n2=the last
suppose i would to have 4 series diff lag, i will put @dlag(x,1,4) this function will generate four series diff lag d(@lag(x,1)),....,d(@lag(x,4)).
now suppose i would to start with the second order of lag i will put @dlag(x,2,4), this function will generate three series diff lag d(@lag(x,2)),....,d(@lag(x,4))
it would be nice if you can make function for @lag(x,n1x2,[s]), because @lag(x,n) generate just one order to be laged.
5- another question: this code generate 4 lags and diff lags, it can not put all y{!i} and dy{!i} in the group it put just the last series (y4 and dy4) in the group. any idea to solve this.

5:

thanks! very much Mr Gareth :D
6-when i generate series and regrouped after i delete the series generated, gourp will be filled by NA obs. why!

Don't understand the question.

if i delete all series generated by the code in my workfile, the group lagg and dlagg will be with NA obs.!

What would you expect them to be filled with?

A group is a collection of series. If you delete the series what would you expect the group to show?

not understand the question, to make graph by group and remove unnecessary series in my work file

Data is stored in series. When you get rid of the series, you get rid of the data.

Got it! thanks! Mr startz and Mr Gareth.