Regarding your first question: I think the problem is you are missing the return command, i.e. function scalar Model( scalar p,) return q= 3*p end function If you do not want a function to return a variable try, function void Model( scalar p,) Cheers, Logan From: gretl-users-bounces(a)lists.wfu.edu [mailto:gretl-users-bounces@lists.wfu.edu] On Behalf Of Daniel Sirim Sent: Friday, August 17, 2012 7:20 AM To: gretl-users(a)lists.wfu.edu Subject: [Gretl-users] function Command Hello , i have got a new question refering to the “function” command. First of all I want to understand the Syntax of this command. I read the Guide and check the syntax but why is it not working? genr p = 3 function scalar Model( scalar p,) q= 3*p end function just a small example but to get to understand it. It says : expected a type identifier…. But why ? there is the name of the Function called Model and also the type … scalar…. What is wrong with that? If I got this, it is my aim to built an Modular System, which means, First on the upper side of the script I want to have the basic formulas, like 1. function series AB (series a, scalar b, scalar c, scalar d) a*(1-exp(-b*(c-c0))) end function 2. Function ….. 3. Function ….. And so on … After declaring and defining the parameters und the function body of the basic formulas, I want to stick them together, I need it like this because it depends on the case which basic function I need and also the sequence could be different ( for example: case 1: 2. Formula + 3. Formula + 2. Formula…. Case 2: 3.Formula + 1.Formula …) My Other Question is is it possible to make this "combinedfunction" easier to write ? What I mean is let the commands like series oder scalar away, cause its also declared. Hopefully somebody can help me I thing there will be some other question but I think for the first round it more then enough. Thank you, and I hope for some answers =) Daniel.

Daniel, Can you see q in the scalars list which can be accessed through the icon view, which can be accessed through the GUI: view->icon view? Also could you use the print command, i.e. print q (or you might look up printf if you want to format the output) Logan P.S. Peter, thanks for the syntax correction. From: gretl-users-bounces(a)lists.wfu.edu [mailto:gretl-users-bounces@lists.wfu.edu] On Behalf Of Summers, Peter Sent: Friday, August 17, 2012 9:55 AM To: Gretl list Subject: Re: [Gretl-users] function Command Daniel, There are actually 2 problems here: 1) You have an extra comma after p – change (scalar p,) to (scalar p). The comma makes Gretl think there are more input arguments coming, hence the ‘missing type identifier.’ 2) Re Logan’s suggestion, you need to assign a value to q before the return command. The following works on my (Win 7) machine: function scalar model(scalar p) q = 3*p return q end function HTH, PS From: gretl-users-bounces@lists.wfu.edu<mailto:gretl-users-bounces@lists.wfu.edu> [mailto:gretl-users-bounces@lists.wfu.edu]<mailto:[mailto:gretl-users-bounces@lists.wfu.edu]> On Behalf Of Daniel Sirim Sent: Friday, August 17, 2012 8:20 AM To: gretl-users@lists.wfu.edu<mailto:gretl-users@lists.wfu.edu> Subject: [Gretl-users] function Command Hello , i have got a new question refering to the “function” command. First of all I want to understand the Syntax of this command. I read the Guide and check the syntax but why is it not working? genr p = 3 function scalar Model( scalar p,) q= 3*p end function just a small example but to get to understand it. It says : expected a type identifier…. But why ? there is the name of the Function called Model and also the type … scalar…. What is wrong with that? If I got this, it is my aim to built an Modular System, which means, First on the upper side of the script I want to have the basic formulas, like 1. function series AB (series a, scalar b, scalar c, scalar d) a*(1-exp(-b*(c-c0))) end function 2. Function ….. 3. Function ….. And so on … After declaring and defining the parameters und the function body of the basic formulas, I want to stick them together, I need it like this because it depends on the case which basic function I need and also the sequence could be different ( for example: case 1: 2. Formula + 3. Formula + 2. Formula…. Case 2: 3.Formula + 1.Formula …) My Other Question is is it possible to make this "combinedfunction" easier to write ? What I mean is let the commands like series oder scalar away, cause its also declared. Hopefully somebody can help me I thing there will be some other question but I think for the first round it more then enough. Thank you, and I hope for some answers =) Daniel.