random number set starting point fixed value
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Dear List; I just set the active generator initialization set starting point (fixed) and generated a normal distribution. I assumed that by setting the initialization point that I would be able to replicate the distribution but stats show
that the two distributions are not identical. I have googled set starting point and the info that I have read suggests that by using a set fixed value one should be able to replicate the outcome. However, my outcomes are not being replicated. I think I am
missing something very basic. Is it that the set point might be fixed but the resulting distiribution of values can be different. ?? martin Martin F. Sherman, Ph.D. Professor of Psychology Director of Masters Education: Thesis Track Loyola University Maryland 4501 North Charles Street 222 B Beatty Hall Baltimore, MD 21210 410 617-2417 |
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Dear List: In regard to my prior post I had assumed that once I ran the set value that I did not have to run it again for the next distributor. When I re ran the set value and then ran the syntax again the results come out the same.
martin Martin F. Sherman, Ph.D. Professor of Psychology Director of Masters Education: Thesis Track Loyola University Maryland 4501 North Charles Street 222 B Beatty Hall Baltimore, MD 21210 410 617-2417 |
Re: random number set starting point fixed value
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In reply to this post by msherman
Martin, please post your syntax. That will allow others to see if they can
duplicate what you're seeing, and perhaps give them some insight into how to fix the problem. msherman wrote > Dear List; I just set the active generator initialization set starting > point (fixed) and generated a normal distribution. I assumed that by > setting the initialization point that I would be able to replicate the > distribution but stats show that the two distributions are not identical. > I have googled set starting point and the info that I have read suggests > that by using a set fixed value one should be able to replicate the > outcome. However, my outcomes are not being replicated. I think I am > missing something very basic. Is it that the set point might be fixed but > the resulting distiribution of values can be different. ?? martin > > > > Martin F. Sherman, Ph.D. > Professor of Psychology > Director of Masters Education: Thesis Track > Loyola University Maryland > 4501 North Charles Street > 222 B Beatty Hall > Baltimore, MD 21210 > > 410 617-2417 > msherman@ > > > ===================== > To manage your subscription to SPSSX-L, send a message to > LISTSERV@.UGA > (not to SPSSX-L), with no body text except the > command. To leave the list, send the command > SIGNOFF SPSSX-L > For a list of commands to manage subscriptions, send the command > INFO REFCARD ----- -- Bruce Weaver [hidden email] http://sites.google.com/a/lakeheadu.ca/bweaver/ "When all else fails, RTFM." NOTE: My Hotmail account is not monitored regularly. To send me an e-mail, please use the address shown above. -- Sent from: http://spssx-discussion.1045642.n5.nabble.com/ ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD
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Bruce Weaver bweaver@lakeheadu.ca http://sites.google.com/a/lakeheadu.ca/bweaver/ "When all else fails, RTFM." PLEASE NOTE THE FOLLOWING: 1. My Hotmail account is not monitored regularly. To send me an e-mail, please use the address shown above. 2. The SPSSX Discussion forum on Nabble is no longer linked to the SPSSX-L listserv administered by UGA (https://listserv.uga.edu/). |
Re: random number set starting point fixed value
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Martin, in future, please post your follow-ups to the same thread as the
original post. I didn't see your follow-up until after I responded to your first post. http://spssx-discussion.1045642.n5.nabble.com/set-random-number-generator-set-point-td5735812.html Bruce Weaver wrote > Martin, please post your syntax. That will allow others to see if they > can > duplicate what you're seeing, and perhaps give them some insight into how > to > fix the problem. > > > > msherman wrote >> Dear List; I just set the active generator initialization set starting >> point (fixed) and generated a normal distribution. I assumed that by >> setting the initialization point that I would be able to replicate the >> distribution but stats show that the two distributions are not identical. >> I have googled set starting point and the info that I have read suggests >> that by using a set fixed value one should be able to replicate the >> outcome. However, my outcomes are not being replicated. I think I am >> missing something very basic. Is it that the set point might be fixed but >> the resulting distiribution of values can be different. ?? martin >> >> >> >> Martin F. Sherman, Ph.D. >> Professor of Psychology >> Director of Masters Education: Thesis Track >> Loyola University Maryland >> 4501 North Charles Street >> 222 B Beatty Hall >> Baltimore, MD 21210 >> >> 410 617-2417 > >> msherman@ > >> >> >> ===================== >> To manage your subscription to SPSSX-L, send a message to > >> LISTSERV@.UGA > >> (not to SPSSX-L), with no body text except the >> command. To leave the list, send the command >> SIGNOFF SPSSX-L >> For a list of commands to manage subscriptions, send the command >> INFO REFCARD > > > > > > ----- > -- > Bruce Weaver > bweaver@ > http://sites.google.com/a/lakeheadu.ca/bweaver/ > > "When all else fails, RTFM." > > NOTE: My Hotmail account is not monitored regularly. > To send me an e-mail, please use the address shown above. > > -- > Sent from: http://spssx-discussion.1045642.n5.nabble.com/ > > ===================== > To manage your subscription to SPSSX-L, send a message to > LISTSERV@.UGA > (not to SPSSX-L), with no body text except the > command. To leave the list, send the command > SIGNOFF SPSSX-L > For a list of commands to manage subscriptions, send the command > INFO REFCARD ----- -- Bruce Weaver [hidden email] http://sites.google.com/a/lakeheadu.ca/bweaver/ "When all else fails, RTFM." NOTE: My Hotmail account is not monitored regularly. To send me an e-mail, please use the address shown above. -- Sent from: http://spssx-discussion.1045642.n5.nabble.com/ ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD
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Bruce Weaver bweaver@lakeheadu.ca http://sites.google.com/a/lakeheadu.ca/bweaver/ "When all else fails, RTFM." PLEASE NOTE THE FOLLOWING: 1. My Hotmail account is not monitored regularly. To send me an e-mail, please use the address shown above. 2. The SPSSX Discussion forum on Nabble is no longer linked to the SPSSX-L listserv administered by UGA (https://listserv.uga.edu/). |
Re: random number set starting point fixed value
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FWIW: I just a moment ago moved the followup post to this thread.
----- Please reply to the list and not to my personal email. Those desiring my consulting or training services please feel free to email me. --- "Nolite dare sanctum canibus neque mittatis margaritas vestras ante porcos ne forte conculcent eas pedibus suis." Cum es damnatorum possederunt porcos iens ut salire off sanguinum cliff in abyssum?" -- Sent from: http://spssx-discussion.1045642.n5.nabble.com/ ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD
Please reply to the list and not to my personal email.
Those desiring my consulting or training services please feel free to email me. --- "Nolite dare sanctum canibus neque mittatis margaritas vestras ante porcos ne forte conculcent eas pedibus suis." Cum es damnatorum possederunt porcos iens ut salire off sanguinum cliff in abyssum?" |
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In reply to this post by msherman
There are two entirely different random number generators in Statistics: the older, traditional generator and the newer and better - more random - Mersenne twister. Their seeds are set by SET SEED and MTINDEX, respectively. Which one is in use is determined by SET RNG. So it is possible that you are setting the seed for the generator that is not currently in use. SHOW RNG displays the current setting, which persists between sessions. The MT generator is recommended, but the older generator is still present for compatibility. On Wed, Mar 28, 2018 at 6:42 AM, Martin Sherman <[hidden email]> wrote:
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