The Multiple Peak Fit tool provides an interactive and easy way to pick multiple peaks in a graph and then fit them with a peak function.
Select Analysis: Peak and Baseline: Multiple Peak Fit from the main menu. This will open the nlfitpeaks dialog.
In the dialog, select the input data and the peak function for performing the fit. Note that the input data is initialized to the active data plot when the tool is launched from a graph window.
Upon clicking the OK button, the dialog will close and the graph will be active. If the tool was launched from a worksheet, a graph will be created. The cursor will change to and the Get Points dialog will open. Use the mouse, or arrow keys on the keyboard to move the cursor to a desired peak center location. Then double-click or press Enter to select that point as a peak center. When you move the cursor, its X and Y coordinate values are displayed in the Get Points dialog and also in the Data Display window. The Get Points dialog also displays the number of peak centers selected.
Once you have selected the desired number of peak centers, you have two options to proceed:
For more advanced peak fitting including baseline detection, please use the peak fitting option in the Peak Analyzer tool, available in OriginPro.