Select at least two columns of values or a range of values from at least two columns. Subject column is optional. Plot designation does not matter; selected columns will be treated as Y columns.
Select the required data.
Select Plot > Statistical > Bland Altman
Origin opens the plot_BA dialog box.
BA_NOSUBJECT.OTPU (installed to the Origin program folder).
Bland Altman plots display the correlation between two different methods (for example, the classical method and a new one) when they are used to measure the same property of same set of samples. Refer to this page for detailed algorithm.