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Can anyone recognize which software do these pressure diagram charts are made from? Can Mathcad do anything of this nature? Thanks
I don't know what made those exactly. But GNU R can do them (or any other plot basically), and it's free.
You can plot them also in Mathcad 14/15 but you have to construct the legend.
See this on Mathcad 14 calculation server
I have used two sepatate counter plots.
See please the temperature field created in Mathcad Prime
(one Fig. from the book http://www.springer.com/gp/book/9783319266732)