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{excerpt}Sets or returns the [type of value|ErrorBar.ErrorValueType] to use as the error amount. Depending on the error type, the amount may be a fixed value, percentage, standard deviation, standard error, or a custom value.{excerpt}
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 public ErrorValueType ValueType{ get; set; }
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Public Property ValueType() As ErrorValueType
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If the ValueType is set to Custom, then you can use the [CustomMinusFormula|ErrorBar.CustomMinusFormula] and [CustomPlusFormula|ErrorBar.CustomPlusFormula] to specify the values of the error for each data point. Otherwise, the amount of error is determined by the [Value|ErrorBar.Value] property.

If you change the ValueType of an error bar, the [Value|ErrorBar.Value] property will be set to the default value for the new error type. This value is 2 for a FixedValue error type, 5 for a Percentage error type, and 1 for a StandardDeviation error type.

If you create a new error bar using ExcelWriter, it will have a default ValueType of FixedValue.
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