IBM Lotus Symphony


Displaying Y error bars

You can use the Y Error Bars window to display error bars for 2D charts.

If an element of a data series is selected, this command works on that data series only. If no element is selected, this command works on all data series.

An error bar is an indicator line that spans over a range from y - NegativeErrorValue to y + PositiveErrorValue. In this term, y is the value of the data point. When Standard Deviation is selected, y is the mean value of the data series. NegativeErrorValue and PositiveErrorValue are the amounts calculated by the error bar function or given explicitly.

  1. Click Create > Y Error Bars.
    Note: This menu item is only available for 2D objects.
  2. Choose different ways to display the error category in the Error category area.
    None
    Does not show any error bars.
    Constant Value
    Displays constant values that you specify in the Parameters area.
    Percentage
    Displays a percentage. The display refers to the corresponding data point. Set the percentage in the Parameters area to the right.
    Functions
    Select a function to calculate the error bars.
    Standard Error
    Displays the standard error.
    Variance
    Displays the variance calculated from the number of data points and respective values.
    Standard Deviation
    Displays the standard deviation (square root of the variance).
    Error Margin
    Displays the highest error margin in percent according to the highest value of the data group. Set the percentage in the Parameters area.
    Cell Range
    Click Cell Range and then specify a cell range from which to take the positive and negative error bar values.
  3. Select Same value for both to use the positive error values also as negative error values. You can only change the value of the "Positve (+)" box. That value gets copied to the "Negative (-)" box automatically.
  4. Specify the error indicator in the Error indicator field.
    • Select Positive and Negative to show positive and negative error bars.
    • Select Positive to show only positive error bars.
    • Select Negative to show only negative error bars.
  5. Click OK.

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