help index setting

SupportCommunity FPScript help index setting

Ansicht von 3 Beiträgen - 1 bis 3 (von insgesamt 3)
  • Autor
    Beiträge
  • #12748
    Ralf Kangralf kang
    Mitglied

    Dim x,i,dtr,result

    result = test2

    dtr=0.00005

    For Each Row i In ori_dataset Do

    x=ori_dataset[i-1] – ori_dataset

    if x > dtr then

    result=ori_dataset

    end
    end
    Return result

    they say “wrong value in index operation”

    how can i do?
    :bang:

    #8414
    Ralf Kangralf kang
    Mitglied

    Dim x,i,dtr,result

    result = test2

    dtr=0.00005

    For Each Row i In ori_dataset Do

    x=ori_dataset[i-1] – ori_dataset

    if x > dtr then

    result=ori_dataset

    end
    end
    Return result

    they say “wrong value in index operation”

    how can i do?
    :bang:

    #9214
    Bernhard KantzBernhard Kantz
    Moderator

    The problem seems to be the line

    result=ori_dataset

    in the If statement.

    If the result dataset (initialized with test2) is smaller in length than the ori_datensatz and you try to write at an index position not present in the result dataset an error occurs.

    One further problem maybe the first difference you form in the loop. For i = 0 the variable x gets the value of last value minus the first value. If the ori_dataset is assumed to be periodic, this would be exactly what you need, otherwise the first difference doesn’t make sense.

    The vector features of FPScript allow you to get rid of the loop. The following expression computes a datasets of the periodic differences in one go:

    Dim delta = ori_datensatz[-1] – ori_datensatz[0] : ori_datensatz[0,-2] – ori_datensatz[1,-1]

    With the aid of the FPScript functions from the Event Isolation group, you can extract the desired indices; in your case the line

    dim idx = ValuesBelowLevel(delta, dtr, EVENT_INDEX+EVENT_COMPLEMENT)

    will select all values strictly greater than dtr.
    Now use

    result[idx] = ori_datensatz[idx]

    to overwrite the selected values in the dataset result.

Ansicht von 3 Beiträgen - 1 bis 3 (von insgesamt 3)
  • Du musst angemeldet sein, um auf dieses Thema antworten zu können.