How can I use patch for arguments those are not x and y coordinates?

I have the x and y coordiantes of a certain geometry saved. I also have accompanying properties stored at the same indices as that of my x and y co-ordinates. For example - say I have a region where I need to find my flow properties such as density,pressure, temperature and so on. I have 2 matrices that have my x coridnate and y coordinate values stored separately and also have 3 matrices that have my flow properties stored.

I want to plot this such that my patch takes input as the flow properties because i want the colorbar to depict the variation of color with the flow property at the specified x and y locations. Patch function colors a region based on x and y coordiantes but I need a function/method to color a region based on the intensity of the properties stored at that index. Any suggestions?

[darova]

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