trendline option missing
The power and exponential trendline options are grayed out (not available) in
my Excel 2003. Why is this and how do I fix it? |
Answer: trendline option missing
The reason why the power and exponential trendline options are grayed out in your Excel 2003 is because your data may not be suitable for these types of trendlines. Power and exponential trendlines are used to show a curved relationship between two variables, and they work best when the data points are spread out evenly on a logarithmic scale. If your data doesn't meet these requirements, Excel won't allow you to use these trendline options.
However, if you believe that your data is suitable for these types of trendlines, you can try the following steps to fix the issue:
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trendline option missing
jemelland -
The power and exponential trendline options are grayed out (not available) in my Excel 2003. Why is this and how do I fix it? < Here are some edited excerpts from my book "Data Analysis Using Microsoft Excel: Updated for Office XP": The power model creates a trendline using the equation y = c * x^b. Excel uses a log transformation of the original x and y data to determine fitted values, so the values of both the dependent and explanatory variables in your data set must be positive. If any y or x values are zero or negative, the Power icon on the Add Trendline Type tab will be grayed out. (As a workaround, you can add a constant to each y and x value.) The exponential model creates a trendline using the equation y = c * e^(b*x). Excel uses a log transformation of the original y data to determine fitted values, so the values of the dependent variable in your data set must be positive. If any y values are zero or negative, the Exponential icon on the Add Trendline Type tab will be grayed out. (As a workaround, you can add a constant to each y value.) - Mike http://www.MikeMiddleton.com |
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