<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="Generator" content="Microsoft Word 14 (filtered medium)"> <style></style> </head> <body lang="EN-US" link="blue" vlink="purple"> <div class="WordSection1"> Hello,<o:p></o:p> <o:p> </o:p> In my experience the command"/gate/random/setEngineSeed auto" works.<o:p></o:p> In your example you are looking at histograms, but to verify that issue I was thinking about something different:<o:p></o:p> <![if !supportLists]>- <![endif]>If the seed did not change as you suspect, the physical properties from every single particle stored in your Phase Space one after the other shall be exactly the same (position, direction, energy, etc.) for 2 simulations.<o:p></o:p> <![if !supportLists]>- <![endif]>Could you check that on a particle basis for 10 or 20 particles?<o:p></o:p> You could even try a very simple example where you could randomly sample 10 particles and look if they are the same for 2 simulations.<o:p></o:p> <o:p> </o:p> Let us know!<o:p></o:p> Thanks<o:p></o:p> <img width="150" height="202" id="Picture_x0020_1" src="cid:image001.jpg@01D15CD1.D059A070" alt="Image:Uncle_Sam_pointing_finger_small.jpg"><img width="150" height="231" id="Picture_x0020_2" src="cid:image002.jpg@01D15CD1.D059A070" alt="Image:We-Need-You1-324x500.jpg"><img width="150" height="140" id="Picture_x0020_3" src="cid:image003.jpg@01D15CD1.D059A070" alt="Image:superdupont-we-need-you.jpg"><img width="150" height="190" id="Picture_x0020_4" src="cid:image004.jpg@01D15CD1.D059A070" alt="Image:gsam_want_gnu_small.jpg"><o:p></o:p> <o:p> </o:p> GATE is a research community, please contribute!<o:p></o:p> <o:p> </o:p> You just started? You found some errors in the examples and the documentation?<o:p></o:p> <![if !supportLists]>§ <![endif]> You can correct the <a href="http://wiki.opengatecollaboration.org/index.php/Main_Page">documentation</a> on the wiki web site<o:p></o:p> <![if !supportLists]>§ <![endif]> You can share your experience on the user <a href="http://www.opengatecollaboration.org/mailinglist">mailing-list</a><o:p></o:p> <o:p> </o:p> You have a few months of experience or more?<o:p></o:p> <![if !supportLists]>§ <![endif]> You can correct or even propose new <a href="http://www.opengatecollaboration.org/Examples">examples</a> <o:p></o:p> <![if !supportLists]>§ <![endif]> You can propose a <a href="http://wiki.opengatecollaboration.org/index.php/GateActor">new gate actor, it is as easy as a plug-in!</a><o:p></o:p> <o:p></o:p> You are now an official Gate addict and you need more?<o:p></o:p> <![if !supportLists]>§ <![endif]> You can participate in Gate C++ source code development: debugging, propose new classes, etc.<o:p></o:p> <![if !supportLists]>ð <![endif]>For new developments, <a href="http://www.opengatecollaboration.org/Git">use git</a> and contact the <a href="http://www.opengatecollaboration.org/mailinglist">gate-devel-mailing-list</a> to be guided.<o:p></o:p> <o:p> </o:p> Thanks for your contribution, the OpenGate collaboration!<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <div> <div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in"> From: gate-users-bounces@lists.opengatecollaboration.org [mailto:gate-users-bounces@lists.opengatecollaboration.org] On Behalf Of hediye acun Sent: Friday, January 29, 2016 3:46 PM To: gate-users@lists.opengatecollaboration.org Subject: [Gate-users] problem with random number seed?<o:p></o:p> </div> </div> <o:p> </o:p> <div> <div id="yiv5901154604yui_3_16_0_1_1443704826828_3081"> Hello All,<o:p></o:p> </div> <div id="yiv5901154604yui_3_16_0_1_1443704826828_3082"> <o:p> </o:p> </div> <div id="yiv5901154604yui_3_16_0_1_1443704826828_3083"> I have Gate "develop" version and at the same time geant4.10.1.0 and root_v5.34.32 on the GPU. My operating system is Linux Mint 17.2 . <o:p></o:p> </div> <div id="yiv5901154604yui_3_16_0_1_1443704826828_3083"> <o:p> </o:p> </div> <div id="yiv5901154604yui_3_16_0_1_1443704826828_3083"> I am triying to simulate a linac head to get Phase Space of photons. Just for an example I run Gate for a basic geometry which include only electron beam, target filter and Phase space plane inside a linac geometry. When I run Gate two or more times for same "number of primaries" I got the exactly the same Phase Space distributions (histogram of Ekine completely identical). But I am using "/gate/random/setEngineSeed auto" command and according to the documentation that should give me the different seed every time when I run it. I would expect some random differences between PhS's from different runs.<o:p></o:p> </div> <div id="yiv5901154604yui_3_16_0_1_1443704826828_3083"> <o:p> </o:p> </div> <div id="yiv5901154604yui_3_16_0_1_1443704826828_3083"> Does anyone have any idea about this issue? Thank you in advance.<o:p></o:p> </div> <div id="yiv5901154604yui_3_16_0_1_1443704826828_3083"> <o:p> </o:p> </div> <div id="yiv5901154604yui_3_16_0_1_1443704826828_3083"> Hediye Acun<o:p></o:p> </div> </div> </div> <div class="WordSection1"> <o:p></o:p>Disclaimer: Please notice our E-Mail Disclaimer <a href="http://www.medaustron.at/email-disclaimer/">http://www.medaustron.at/email-disclaimer/</a><o:p></o:p><o:p> </o:p> </div> </body> </html>