95 Percent Confidence Band

By Template Librarian|Published On: August 12, 2021 at 10:44 am PDT|Last Updated: January 27, 2022 at 6:21 pm PST|

If you are a registered user, you can click on the Edit Graph button to open the TechGraph Editor showing the data and settings of this sample chart. You can review and edit the data and settings to learn about the features and capabilities of the application. Shown below are the steps in the Data Table and in the Edit Chart used to create this chart.

Data Table

Graph Type is “Combo“.
X Data Type is “Number and contains numeric values for the X Axis.
Graph A is a Line graph and it contains the Upper Confidence values.
Graph B is a Line graph and it contains the Lower Confidence values
Graph C is a Scatter graph and it has data that trend like an exponential curve.
Note Graph A and Graph B can be left empty initially. See Nonlinear Curve Fitter below on how to save the Confidence Interval values resulting from the fit calculation.
The data for this graph could have originated from an external spreadsheet (Excel or Google Sheets). You can copy the data from the spreadsheet to the clipboard and then paste them into the Data Table.
The data for this graph could have been stored in a CSV (comma-separated-values) file. Click on Upload in the Edit Data toolbar and select CSV/Text command to upload a CSV file from your local storage.

Nonlinear Curve Fitter

Click on Curve Fitter on Edit Data toolbar and select Nonlinear Curve Fit. The data in this example has a data trend like an exponential curve. In the Nonlinear Curve Fit Menu, select the Exponential (#2) box, enter “X” in the X Data Col, “C” in the Y Data Col, “1” in Start Row, and “110” in End Row. Click Calculate to start the fit calculation.
Select the Save tab after the calculation is completed. Select “Y Predict Equation” from the Selection list. Enter “C” in the Destination Col field and click Save. An exponential equation is generated and saved in the Graph C Equation field in Curves and Error Bars.
Select “Confidence Interval” from the Selection list, and “95 Percent” from the Level list. Enter “A” in the Destination Col field and click Save. The Confidence Values are stored in Graph A and B.

Edit Chart

Settings

Click on Graph Type for Graph A. Select Line for A.
Click on Graph Style for Graph A. Set the Color, Thickness, and Type for Line A. Set the Fill Color and Pattern. Check on Fill Below Line. Note that Fill Color for A is displayed in the Confidence band.
Click on Graph Type for Graph B. Select Line for B.
Click on Graph Style for Graph B. Set the Color, Thickness and Type for Line B. Set the Fill Color and Pattern. Check on Fill Below Line. Note the Fill Color for B should be the same as the frame background color.
Click on Graph Type for Graph C. Select Scatter for C.
Click on Graph Style for Graph C. Set the Marker Color, Type and Size.
Click on Frame Style/Bkgrd. Check Background On. Set Color and Pattern for the frame background.

Curves and Error Bars

Click on Equation entry for Graph C to view the saved Exponential equation. Uncheck the Show Equation. Enter “3′ in Decimal Places.
Click on Equation Style for Graph C. Set the Equation Color, Line Thickness, and Type.

X Axis

Enter appropriate values for Minimum, Maximum, Major Div, Minimum Start, and Maximum End. Leave these values empty for automatic scaling.

Y Axis

Enter appropriate values for Minimum, Maximum, Major Div, Minimum Start, and Maximum End. Leave these values empty for automatic scaling.

Chart Background

Click on Grid Setup on Edit Chart toolbar. Check Background On. Set Top Color and Bottom Color for the Chart Background.

Edit Chart Toolbar Options

Print Chart prints your chart.
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95 Percent Confidence Band