how to... make a 'for 0 to x' variable that can insert digits IN an attribute name?

[liwenna]

Hello Ben,

Thanks for such a quick reply!

It should become something like that indeed!

 But... correct me if I am wrong (I am at home now so no e-prime at my
disposal, i'll certainly give it a try tomorrow), it seems that in the
code you wrote the 'second m' is placed outside the attributename
whereas I actually need it to be inside the attribute name, to adress
attributes called "restid1", "restid2" and "restid3" .

And (but thats secondary at the moment) it should be a variable other
than m as m will run up till 16, whereas this piece of code should be
repeated every 4 lines of m.



On Nov 4, 10:10 pm, ben robinson <baltimore.... at gmail.com> wrote:
> something like this?
>
> for m = 1 to 4
>
> triallist.SetAttrib m, "restid" & m, randomlist(randompos(m-1))
>
> next m
>
> On Wed, Nov 4, 2009 at 3:52 PM, liwenna <liwe... at gmail.com> wrote:
>
> > Short question:
> > In the piece of code below: how do I implement a variable that
> > replaces the digits 1-3 in the attribute names 'restid1' - 'restid3'
> > so that I can shorter the code to a single line (using an additional
> > 'for 0 to 2' variable for the (randompos(x)) part) ?
>
> > **************************************
> > for m = 1 to 4
>
> > triallist.SetAttrib m, "restid1", randomlist(randompos(0))
> > triallist.SetAttrib m, "restid2", randomlist(randompos(1))
> > triallist.SetAttrib m, "restid3", randomlist(randompos(2))
>
> > randomizearray randompos
>
> > next m
> > ***************************************
>
> > Long explanation:
> > Ok.... So... I have this habit of writing enormous inlines because I
> > am generally to lazy or not in the mood to figure out/learn how to
> > shorten them....  I decided that I am gonna break this habit and have
> > choosen a nice litle experiment to do this with. However: I am stuck
> > now. My hope is that someone here knows off hand what lines I need and
> > is able to drop me a line.
>
> > In the final experiment each display holds 16 positions which will be
> > filled with one targetstimulus and 15 distractorstimuli. There are 16
> > possible targetstimuli which will each have to appear in one of the 16
> > possible positions (a 4x4 grid, 16 locations x16 targetstimuli = 256
> > trials). The identity of the targetstimulus decides which 15 stimuli
> > should be used as distractorstimuli and I like to have the location of
> > each of the distractorstimuli randomized... Unfortunately this means
> > that for each trial there are 15! possible arrangements of the
> > distractorstimuli (1 307 674 368 000). I don't like
> > pseudorandomizations that well so I took up the challenge and actually
> > got quite far so far. For obvious reasons I am working the whole thing
> > out with a smaller number of positions: 4 (2x2 grid).
>
> > This is what I got now: for target ID 1 a list with the 15
> > distractorstimuli for this target is loaded from a textfile into an
> > array and randomized. A second array holds the numbers 1-15 which
> > corresponds with locations 1-15. For each level of the triallist (m)
> > the randomized distractorstimuli are randomly loaded into attributes
> > called "restid1" up to "restid3" (4 locations, 1 holds the target).
> > When a level is filled, the randompos array is rerandomized so that
> > for the next level each distractorstimulus is loaded into a different
> > restid-attribute. The piece of code shown below deals with the first 4
> > levels (target ID 1), the code will have to repeat for the next 4
> > levels but then load id2restids.txt instead (containing
> > distractorstimuli for target ID 2), etc etc. As you can see this
> > inline will still become rather bulky so here's the question again:
> > can I shorten the 3 lines that fill the triallist-levels to 1 line by
> > using another 'for 1 to 3' attribute (one of those mysterious %_ & #
> > perhaps?) that can actually be used IN an attribute name?
>
> > ***********************************************
> > for m = 1 to 4
>
> > Open "id1restids.txt" For Input As #1
> > For n = 0 To 2
> > Input #1, randomlist(n)
> > Next n
> > Close #1
>
> > randomizearray randomlist
>
> > for q = 0 to 2
> > randompos(q) = q
> > next q
>
> > randomizearray randompos
>
> > triallist.SetAttrib m, "restid1", randomlist(randompos(0))
> > triallist.SetAttrib m, "restid2", randomlist(randompos(1))
> > triallist.SetAttrib m, "restid3", randomlist(randompos(2))
>
> > randomizearray randompos
>
> > next m
> > *******************************************
>
> > I've checked the guides, checked the e-primer, searching all over the
> > place for a piece of code that I could steal the trick from, but to no
> > avail so far. What certainly doesn't help is that I so far never quite
> > got the deal with the & % _ crf things.... (that's probably
> > embarrassing but true :p )
>
> > I hope someone knows a nice solution for me.
>
> > Best regards,
>
> > liw
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