Attribute cell to lookup value?

[Stephen Mattingly]

thanks so much - this is very helpful!

On Wednesday, November 20, 2013 3:20:15 AM UTC-5, Paul Groot wrote:
>
> Just a minor detail: instead of a while loop you could use a for-loop, 
> which is the preferred construction to iterate over an index, and is less 
> sensitive for infinite loop 'accidents'. 
>
> About your question: I think it would be a nice feature to be able to 
> refer to E-Basic variables inside list elements. However, the developers of 
> E-Prime used a different approach for dynamically loading list content: 
> 1) the []-syntax to reference the content of another attribute (i.e. 
> [OtherAttrib])
> 2) nested lists
>
> You can combine the two to pull values from another (nested) list. So, if 
> you put the four filenames in a nested ColorList, you could use these 
> values in the Train list. (Using the randomization settings of the 
> ColorList when populating the Train list.) In this case you probably have 
> to use the colon syntax to pull four values from the same nested attribute 
> for a single Train trial ([OtherAttrib:0] [OtherAttrib:1] etc.). So, in 
> your case you could place [OtherAttrib:0] in the Color1 attribute, 
> [OtherAttrib:1] in the Color2 attribute, etc.
>
>
> Also see the attached example.
>
> Cheers
> Paul
>
>
>
>
>
> On 20 November 2013 00:09, Stephen Mattingly <ndlabm... at gmail.com<javascript:>
> > wrote:
>
>> Hi All,
>>    Is there any way for an attribute cell (within a list) to call for a 
>> value, rather than just use the value in the cell?
>>
>> currently, if i put a string variable name in the attribute cell in a 
>> list (e.g. randomColor(0) ), it tries to find a file name that is the 
>> variable name (tries to find file,"randomColor(0)" ). rather, i would like 
>> it to look up the value stored by the variable and use THAT string as a 
>> filename.
>>
>> as i build complexity  into this task, my current solution becomes a 
>> pain, but my current solution is below:
>>
>>
>> ---
>>
>> i want to randomize a list of colors at the beginning, but to keep the 
>> value the same for the rest of the experiment.
>>
>> first inline
>>
>> Dim randomColor(3) as String
>> randomColor(0)="red.bmp"
>> randomColor(1)="blue.bmp"
>> randomColor(2)="yellow.bmp"
>> randomColor(3)="green.bmp"
>> Randomize
>> randomizeArray randomColor
>>
>> while ColorAssignCount < 49  '48 training trials
>>
>> Train.SetAttrib ColorAssignCount, "Color1", randomColor(0)
>> Train.SetAttrib ColorAssignCount, "Color2", randomColor(1)
>> Train.SetAttrib ColorAssignCount, "Color3", randomColor(2)
>> Train.SetAttrib ColorAssignCount, "Color4", randomColor(3)
>>
>> ColorAssignCount = ColorAssignCount + 1
>>
>> wend
>> --
>>
>> it would be simpler to be able to call, within each list, 
>> 'randomColor(0)', as i will eventually have many lists and other elements 
>> that need randomization in a similar way. 
>>
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>

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