Begin by defining the x, y and z values for the plot, if you don't already have them. For example, at MATLAB's command prompt type the following:x = 1:0.1:10; y = sin(x); z = magic(91);This code ...

More information: Yizhou Wang et al, The methods and program implementation for river longitudinal profile analysis—RiverProAnalysis, a set of open-source functions based on the Matlab platform ...