Activate the matrix sheet or select required data from worksheet.
From the menu, choosev Plot> 3D: Surface: 3D Y Constant with Base.
Click the 3D Y Constant with Base button on the 3D and Contour Graphs toolbar.
(Installed to the Origin program folder).
The Z values determine a surface of grid lines parallel to the X axis. The front surface displays a fill color. X and Y side walls are also enabled.