[OS X TeX] Creating and plotting data in pstricks

[Nitecki, Zbigniew H.]

I’m trying to create a picture (to illustrate least squares approximation) in a tex document, using pstricks.
I am unclear from pp 325-328 of the LaTeX Graphics Companion how and where the data file should be saved.
(My data is simply a set of points).
I tried to mimic the example in http://texdoc.net/texmf-dist/doc/generic/pst-plot/pst-plot-doc.pdf
which seemed to indicate that it could be saved withing the tex document, but I get an error message I don’t understand (indicating that something is inaccessible).
Can anyone help me make this work without undue pain?  My minimal example is appended below.



Zbigniew Nitecki
Department of Mathematics
Tufts University
Medford, MA 02155

telephones:
Office    (617)627-3843
Dept.    (617)627-3234
Dept. fax    (617)627-3966
http://www.tufts.edu/~znitecki/




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