Fitting a sigmoidal curve to data on a chart using Microsoft Excel
- First, make sure your data is organized in two columns: one for the x-axis values and one for the y-axis values.
- Select the data you want to use for the curve fit.
- Click on the "Insert" tab in the Excel ribbon and select "Scatter" from the chart options.
- Choose the scatter chart type that includes lines connecting the data points.
- Right-click on one of the data points and select "Add Trendline" from the context menu.
- In the "Format Trendline" pane that appears on the right side of the screen, select "Logistic" as the trendline type.
- Adjust the other trendline options as desired, such as the line color and thickness.
- Click "Close" to apply the trendline to the chart.
Your chart should now display a sigmoidal curve that fits the data. You can use this curve to make predictions or analyze the relationship between the x and y variables.