Randomizing image position in a slide object

[Tobias]

Hi Gilis,

I think this should work: Have an attribute in the list, let's say
"posX". Refer to the x values of the bitmaps with [posX]. If I
understood you correctly, the y value is not to be changed. If yes,
this can also be done without problems.

Well, have an inline like this before the display appears:

dim x as integer
x = random(1,3)
if x = 1 then c.setattrib "posX", 200
if x = 2 then c.setattrib "posX", 400
if x = 3 then c.setattrib "posX", 600

This will set posX randomly to 200, 400 or 600 and of course you can
change these values.
However, if you really want to make sure that each subject had each
condition equally often, you should go for setting this in the list.
This is imho the more elegant way ;)

Best,
Tobias


On 22 Feb., 15:44, gilis <gilads... at gmail.com> wrote:
> Hi to all again,
>
> Appologize for bothring the forum again, but it's not a too hard one I
> hope:
> I want the computer to randomly present the stimuli in the center,
> left or right side
> of the display.
>
> I know that  it can be done easily by adding attribute ("side") in the
> trial list with values of left right or center and then to define the
> X axis of the image in the slide object as [side] and that's all.
>
> However, this method means that I have to insert manualy all different
> combinations -and it's not an elegant solution.
>
> I tried to define side as a new attribute in an inline object this way
>
> c.SetAttrib "side", RandomizeArray(1,3,4)
>
> of course-it didn't work and I tried many different configurations and
> randomization commands. With which command can I randomize left,
> center and right?
>
> Thanks,
> Gilis

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