PChem Teaching Lab

Using Origin 2017

Plotting a Graph (Line of Best Fit)

Having plotted a graph in Origin, a line of best fit can be added as follows:

1. Click on Analysis → Fitting → Linear Fit → Open Dialog.

2. Click on "OK" when the Linear Fit dialog box appears.

3. Select "No" when asked whether to be directed to the report sheet.

Once completed the plot should appear with a trendline and a table containing information about the fitted trendline.

IMPORTANT NOTE: The error displayed in the table for the Slope and Intercept are the standard errors for these parameters. In the Level 4 Labs the 95% Confidence Level and NOT the standard error should be used. The 95% CL can easily be determined using Excel.

Smoothing a Curve

Using Origin 2017 - Contents Page

1.	Click on Analysis → Fitting → Linear Fit → Open Dialog.
2.	Click on "OK" when the Linear Fit dialog box appears.
3.	Select "No" when asked whether to be directed to the report sheet.