An app designer matlab application for plotting contour from an external excel file. You can import the data from an excel file, Data will be shown in a dedicated table in the "Total Table" tab. Then You have to identify X, Y and Z columns with the dropdowns. If you Want to fix some prameters, you can identify it and fix the desired value with sliders. You can see the filtered data in "Filtered Table" tab after applying constraints. Finally You can see the contour curve in "Diagram" tab.