Send Gretl-users mailing list submissions to gretl-users(a)lists.wfu.edu To subscribe or unsubscribe via the World Wide Web, visit http://lists.wfu.edu/mailman/listinfo/gretl-users or, via email, send a message with subject or body 'help' to gretl-users-request(a)lists.wfu.edu You can reach the person managing the list at gretl-users-owner(a)lists.wfu.edu When replying, please edit your Subject line so it is more specific than "Re: Contents of Gretl-users digest..." Today's Topics: 1. Re: Random selection from two data series and blending (Sven Schreiber) 2. Re: Adding data values on the fly (George Matysiak) ---------------------------------------------------------------------- Message: 1 Date: Tue, 13 Dec 2016 18:16:53 +0100 From: Sven Schreiber <svetosch(a)gmx.net&gt; To: gretl-users(a)lists.wfu.edu Subject: Re: [Gretl-users] Random selection from two data series and blending Message-ID: <55a014df-93df-8e23-2044-59039eca96ba(a)gmx.net&gt; Content-Type: text/plain; charset=windows-1252; format=flowed Am 13.12.2016 um 17:30 schrieb George Matysiak: > I have a related question. I have undated data in two series x and y, > with 50 observations in each. There is no overlap in their respective > observation numbers i.e. x runs from 1-50 and y from 51-100. I would > like to draw a random sample from each, say 20, and combine the two > random samples into a series consisting of the 40 observations. I've > played around with this but can't quite seem to get there. Any > suggestions would be very welcome. Thanks. George, first it would be helpful if you could quote a few lines of the original post to which you're referring when you write things like "related". (Also, your posts somehow break the mailing thread structure, they aren't recognized as replies to something earlier. Which makes it even harder to understand to what you're referring. That's probably the fault of your mail program; which one are you using?) Anyway, you could use the resample() function combined with a bunch of sample (smpl) restrictions to get the desired sample lengths. This is also in the menus I think under the "Sample" main menu (draw with replacement). Perhaps more advanced and for scripting use could be the use of mrandgen(i,< ...>) to produce random integers to be used as index numbers for drawing from the series. hth, sven ------------------------------ Message: 2 Date: Tue, 13 Dec 2016 19:02:27 +0100 From: George Matysiak <gmatysiak(a)gmail.com&gt; To: gretl-users(a)lists.wfu.edu Subject: Re: [Gretl-users] Adding data values on the fly Message-ID: <CAEWMk7s=ciQ4gRFVuaYkFYEv+so+H89_Jmxt0JEosd_mu4D0bA@mail. gmail.com> Content-Type: text/plain; charset="utf-8" Sven, This is my script: # Projecting levels value of x1 for 3 periods ahead, 2016-2018 Dataset addobs 3 scalar x1_GROWTH= 5 # Annual Percentage Growth genr x1["2016"]= (1+x1_GROWTH/100)*x1["2015"] genr x1[2017"]= (1+x1_GROWTH/100)*x1["2016"] genr x1["2018"]= (1+x1_GROWTH/100)*x1["2017"] fcast 2016 2018 variable_name The last x1 value is for 2015 and these generated x1 values are then put into an existing series x1. These are your x1 values. I could simply change the scalar value to obtain a different scenario, say x2 values. I wasn't sure how to save the different scenario values, x2, as they would overwrite the previous values in the x1 scenario values. Hope that makes sense. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.wfu.edu/pipermail/gretl-users/ attachments/20161213/8633c06e/attachment-0001.html> ------------------------------ _______________________________________________ Gretl-users mailing list Gretl-users(a)lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users End of Gretl-users Digest, Vol 119, Issue 15 ********************************************