How do I create a surface or contour plot with x, y, and z vectors?

I have three vectors that represent X-Y-Z triplets. How do I produce a contour or surface plot of this data using "meshgrid" and "griddata"? 

Answer 1

[MathWorks Support Team]

In creating three-dimensional representations of data, it is often necessary to have data defined over evenly spaced, two-dimensional grids. These grids can be created using the "meshgrid" command. The "griddata" command can then be used to interpolate new z-values at the points contained in the output of "meshgrid".  The outputs of "griddata" and "meshgrid" can then be used as the inputs to plotting commands such as "surf", "mesh", or "contour" to visually represent the data, where the outputs of "meshgrid" are used as the x- and y-components and the output of "griddata" is uses as the z-component. 

Please refer to the following documentation for a detailed example.

MATLAB: Interpolating Scattered Data

https://www.mathworks.com/help/matlab/math/interpolating-scattered-data.html#bsovi2t