Semi random song play

[Michiel Sovijarvi-Spape]

Hi,
"how can I randomly select two trials from the list of 4?"
Well, you should be able to know how to select fewer than the full list of
trials from a list after going through the barest minimum of the getting
started guide to E-Prime. 

"Songs 3 and 4 are different!"
That's what you asked, no? Or do you mean, "only songs 3 and 4 need to be
different, not the rest". That'd be a bit uncommon (usually people want to
avoid repetition in general, if they do this restricted randomisation
thing), but sure, then there are a few combinations which I omitted. Of
course, you could just extend the list by including:
[Songs:1] [Songs:1] [Songs:2] [Songs:3] [Songs:2] [Songs:3]
[Songs:1] [Songs:1] [Songs:2] [Songs:3] [Songs:3] [Songs:2]
[Songs:1] [Songs:2] [Songs:2] [Songs:1] [Songs:3] [Songs:3]
[Songs:1] [Songs:2] [Songs:2] [Songs:3] [Songs:1] [Songs:3]
[Songs:1] [Songs:2] [Songs:2] [Songs:3] [Songs:3] [Songs:1]
...
Not exactly sure whether I now included all different combinations, I really
suggest you figure that one out yourself. Indeed, there are only that many
combinations in total, so you could just write them all out and delete the
ones that your type of randomisation doesn't allow. Sure, takes a while, but
so does writing emails, asking for help, and indeed replying to them. Hope
this helps anyway.
Best,
Michiel


-----Original Message-----
From: e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] On Behalf
Of Darina
Sent: 05 June 2012 21:45
To: E-Prime
Subject: Re: Semi random song play

Songs 3 and 4 are different! Since I only need the 3 songs to each play
twice, how can I randomly select two trials from the list of 4? I imagine
this requires an in-line code?

Thank you for any help!

On Jun 5, 2:22 pm, Darina <dashka.... at gmail.com> wrote:
> That works, thank you very much!
>
> On Jun 5, 2:41 am, "Michiel Sovijarvi-Spape" <msp... at cognitology.eu>
> wrote:
>
>
>
>
>
>
>
> > Hi,
> > Presumably, there are different, better methods. My first idea is to 
> > use a nested list, colon syntax, and some consideration of the 
> > possible different combinations. No inline code necessary.
> > 1. Create a list. Within there, make a nested list, say "songs", 
> > featuring all the songs you have, using one attribute, say, "Songs". 
> > Set the nested list to randomize.
> > 2. Within the trial procedure, have 6 slides (or whatever), one 
> > after another, (say slide1, slide2, slide3..slide6) with the sounds 
> > (as, i think, sounddevice sub-objects) playing as you see fit. More 
> > importantly, set the filename of each of the sounds to be [Song1],
[Song2], .. [Song6].
> > 3. Again, in the list object (not the nested one), make 6 attributes 
> > with "Song1", "Song2".. "Song6". Enter, in the triallist, the 
> > following trials (one column for each attribute):
> > [Songs:1] [Songs:2] [Songs:3] [Songs:1] [Songs:2] [Songs:3] 
> > [Songs:1] [Songs:2] [Songs:3] [Songs:1] [Songs:3] [Songs:2] 
> > [Songs:1] [Songs:2] [Songs:3] [Songs:2] [Songs:3] [Songs:1] 
> > [Songs:1] [Songs:2] [Songs:3] [Songs:2] [Songs:1] [Songs:3] ... 
> > that's it, works.
> > You see, WHICH song is the first in the list of songs will be 
> > randomised, so the first 3 songs only need to be different ones. 
> > Thus, in trial 1, SOME song is taken from the full list of songs, 
> > that is, the first in the randomised nested list. The second song 
> > will be a different one, and the third another different one. The 
> > only pre-requisite for the fourth song is that it is either the 
> > first or second of the played songs, and so on - showing that there are,
in fact, only 4 combinations possible.
>
> > So, may sound like an awkward way of going about these things, but I 
> > think it's actually quite elegant.
> > Best,
> > Michiel
>
> > -----Original Message-----
> > From: e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] On 
> > Behalf
>
> > Of Darina
> > Sent: 04 June 2012 18:13
> > To: E-Prime
> > Subject: Semi random song play
>
> > Hello, I am new to E-Prime so I do not know much about coding.
> > I need to play 3 songs twice in random order. However, I need the 
> > third and forth song to be different. How can I do this?
>
> > Thank you for any help!
>
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