Millisecond Forums » Millisecond Forums » Inquisit 6 » Index of max function

RE: Index of max function

Dave — Mon, 02 Oct 2023 19:02:02 GMT

+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Dave - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
Dear Inquisit Team,

What is the best way to find the index of a value in the max function?

i.e. index of max(4,0,1,3,2) would return 1, index of max(2,3,4,1,5) would return 5.

I feel like there might be a way to do this with lists: https://www.millisecond.com/support/docs/current/html/language/functions/indexof.htm

Thanks,
Andrew
[/quote]

Not sure how to edit, but obviously the examples I gave would be for the min function. For the max, we would return 1 and 5, respectively, thanks
[/quote]

This solution seems to work for values <=5 but is not general to any integer N without N if else statements.

[code]<list best>
/ items = (values.rem0, values.rem1, values.rem2, values.rem3, values.rem4, values.rem5)
/ poolsize = 6
/ selectionrate = always
</list>[/code]
[/quote]

I'm not at all sure what you want to do and for what purpose. Give a concrete example, please.
[/quote]

It's very simple. I want to find the index for which the minimum value occurs. i.e. if I have a set of numbers in a specific sequence, I want to be able to find the index of the minimum of that sequence. In R programming language this is the which.min() function. Here is how you'd do it in Python: https://stackoverflow.com/questions/2474015/getting-the-index-of-the-returned-max-or-min-item-using-max-min-on-a-list

The purpose of doing this is to dynamically change block lengths depending on contingency to keep 3 conditions as balanced as possible while accounting for variable subject behavior.

[/quote]

A list has maximum and minimum properties.

https://www.millisecond.com/support/docs/current/html/language/properties/maximum.htm
https://www.millisecond.com/support/docs/current/html/language/properties/minimum.htm
https://www.millisecond.com/support/docs/current/html/language/elements/list.htm

So, first get the maximum (or minimum, whatever you're interested in) value, then use indexof() to find that value's index.

[code]<list mylist>
/ items = (12, 9, 15, 7, 13, 7)
</list>

<values>
/ min = null
/ max = null
/ iMin = -1
/ iMax = -1
</values>

<trial mytrial>
/ ontrialbegin = [
    values.min = list.mylist.minimum;
    values.iMin = list.mylist.indexof(values.min);
    values.max = list.mylist.maximum;
    values.iMax = list.mylist.indexof(values.max);
]
/ stimulusframes = [1=mytext]
/ validresponse = (57)
</trial>

<text mytext>
/ items = ("List: <%list.mylist.item(1)%>, <%list.mylist.item(2)%>, <%list.mylist.item(3)%>, <%list.mylist.item(4)%>, <%list.mylist.item(5)%>, <%list.mylist.item(6)%>
Min: <%values.min%> at index <%values.iMin%>
Max: <%values.max%> at index <%values.iMax%>")
</text>
[/code]

If there are multiple values equal to max or min, indexof() returns the index of the first value matching max or min.

RE: Index of max function

AndrewPapale — Mon, 02 Oct 2023 18:58:57 GMT

+x[quote]

[b]Dave - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Dave - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
Dear Inquisit Team,

What is the best way to find the index of a value in the max function?

i.e. index of max(4,0,1,3,2) would return 1, index of max(2,3,4,1,5) would return 5.

I feel like there might be a way to do this with lists: https://www.millisecond.com/support/docs/current/html/language/functions/indexof.htm

Thanks,
Andrew
[/quote]

Not sure how to edit, but obviously the examples I gave would be for the min function. For the max, we would return 1 and 5, respectively, thanks
[/quote]

This solution seems to work for values <=5 but is not general to any integer N without N if else statements.

[code]<list best>
/ items = (values.rem0, values.rem1, values.rem2, values.rem3, values.rem4, values.rem5)
/ poolsize = 6
/ selectionrate = always
</list>[/code]
[/quote]

I'm not at all sure what you want to do and for what purpose. Give a concrete example, please.
[/quote]

It's very simple. I want to find the index for which the minimum value occurs. i.e. if I have a set of numbers in a specific sequence, I want to be able to find the index of the minimum of that sequence. In R programming language this is the which.min() function. Here is how you'd do it in Python: https://stackoverflow.com/questions/2474015/getting-the-index-of-the-returned-max-or-min-item-using-max-min-on-a-list

The purpose of doing this is to dynamically change block lengths depending on contingency to keep 3 conditions as balanced as possible while accounting for variable subject behavior.

[/quote]

A list has maximum and minimum properties.

https://www.millisecond.com/support/docs/current/html/language/properties/maximum.htm
https://www.millisecond.com/support/docs/current/html/language/elements/list.htm

So, first get the maximum (or minimum, whatever you're interested in) value, then use indexof() to find that value's index.

[code]<list mylist>
/ items = (12, 9, 15, 7, 13, 7)
</list>

<values>
/ min = null
/ max = null
/ iMin = -1
/ iMax = -1
</values>

<trial mytrial>
/ ontrialbegin = [
    values.min = list.mylist.minimum;
    values.iMin = list.mylist.indexof(values.min);
    values.max = list.mylist.maximum;
    values.iMax = list.mylist.indexof(values.max);
]
/ stimulusframes = [1=mytext]
/ validresponse = (57)
</trial>

<text mytext>
/ items = ("List: <%list.mylist.item(1)%>, <%list.mylist.item(2)%>, <%list.mylist.item(3)%>, <%list.mylist.item(4)%>, <%list.mylist.item(5)%>, <%list.mylist.item(6)%>
Min: <%values.min%> at index <%values.iMin%>
Max: <%values.max%> at index <%values.iMax%>")
</text>
[/code]

If there are multiple values equal to max or min, indexof() returns the index of the first value matching max or min.

[/quote]

Thank you I was close. DIdn't know about the min max property of lists. Appreciate your help.

Index of max function

AndrewPapale — Mon, 02 Oct 2023 18:58:57 GMT

Dear Inquisit Team,

What is the best way to find the index of a value in the max function?

i.e. index of max(4,0,1,3,2) would return 2, index of max(2,3,4,1,5) would return 4.

I feel like there might be a way to do this with lists: https://www.millisecond.com/support/docs/current/html/language/functions/indexof.htm

Thanks,
Andrew

RE: Index of max function

AndrewPapale — Mon, 02 Oct 2023 18:42:13 GMT

+x[quote]

[b]Dave - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
Dear Inquisit Team,

What is the best way to find the index of a value in the max function?

i.e. index of max(4,0,1,3,2) would return 1, index of max(2,3,4,1,5) would return 5.

I feel like there might be a way to do this with lists: https://www.millisecond.com/support/docs/current/html/language/functions/indexof.htm

Thanks,
Andrew
[/quote]

Not sure how to edit, but obviously the examples I gave would be for the min function. For the max, we would return 1 and 5, respectively, thanks
[/quote]

This solution seems to work for values <=5 but is not general to any integer N without N if else statements.

[code]<list best>
/ items = (values.rem0, values.rem1, values.rem2, values.rem3, values.rem4, values.rem5)
/ poolsize = 6
/ selectionrate = always
</list>[/code]
[/quote]

I'm not at all sure what you want to do and for what purpose. Give a concrete example, please.
[/quote]

It's very simple. I want to find the index for which the minimum value occurs. i.e. if I have a set of numbers in a specific sequence, I want to be able to find the index of the minimum of that sequence. In R programming language this is the which.min() function. Here is how you'd do it in Python: https://stackoverflow.com/questions/2474015/getting-the-index-of-the-returned-max-or-min-item-using-max-min-on-a-list

The purpose of doing this is to dynamically change block lengths depending on contingency to keep 3 conditions as balanced as possible while accounting for variable subject behavior.

RE: Index of max function

Dave — Mon, 02 Oct 2023 18:36:52 GMT

+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
Dear Inquisit Team,

What is the best way to find the index of a value in the max function?

i.e. index of max(4,0,1,3,2) would return 1, index of max(2,3,4,1,5) would return 5.

I feel like there might be a way to do this with lists: https://www.millisecond.com/support/docs/current/html/language/functions/indexof.htm

Thanks,
Andrew
[/quote]

Not sure how to edit, but obviously the examples I gave would be for the min function. For the max, we would return 1 and 5, respectively, thanks
[/quote]

This solution seems to work for values <=5 but is not general to any integer N without N if else statements.

[code]<list best>
/ items = (values.rem0, values.rem1, values.rem2, values.rem3, values.rem4, values.rem5)
/ poolsize = 6
/ selectionrate = always
</list>[/code]
[/quote]

I'm not at all sure what you want to do and for what purpose. Give a concrete example, please.

RE: Index of max function

AndrewPapale — Mon, 02 Oct 2023 18:00:21 GMT

+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
Dear Inquisit Team,

What is the best way to find the index of a value in the max function?

i.e. index of max(4,0,1,3,2) would return 1, index of max(2,3,4,1,5) would return 5.

I feel like there might be a way to do this with lists: https://www.millisecond.com/support/docs/current/html/language/functions/indexof.htm

Thanks,
Andrew
[/quote]

Not sure how to edit, but obviously the examples I gave would be for the min function. For the max, we would return 1 and 5, respectively, thanks
[/quote]

This solution seems to work for values <=5 but is not general to any integer N without N if else statements.

[code]<list best>
/ items = (values.rem0, values.rem1, values.rem2, values.rem3, values.rem4, values.rem5)
/ poolsize = 6
/ selectionrate = always
</list>[/code]

RE: Index of max function

AndrewPapale — Mon, 02 Oct 2023 17:13:05 GMT

+x[quote]

[b]Andrew Papale - 10/2/2023[/b]
Dear Inquisit Team,

What is the best way to find the index of a value in the max function?

i.e. index of max(4,0,1,3,2) would return 1, index of max(2,3,4,1,5) would return 5.

I feel like there might be a way to do this with lists: https://www.millisecond.com/support/docs/current/html/language/functions/indexof.htm

Thanks,
Andrew
[/quote]

Not sure how to edit, but obviously the examples I gave would be for the min function. For the max, we would return 1 and 5, respectively, thanks