need to plot this question
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plot the compressibility chart using peng and robinson equation of state the values of Tr 1.0-1.5 (increment of 0.1) and Pr from 0-10 .. using the global for Pr and Tr
pc = 220.55
Tc = 647.1
3 Comments
James Tursa
on 31 Mar 2015
Please post what you have done so far and ask specific questions about it.
Answers (1)
Michael Haderlein
on 1 Apr 2015
Edited: Michael Haderlein
on 1 Apr 2015
Please... Did you ever write this into the Matlab editor? If so, you would see that the error is in the very first line - you cannot have a & character in the function name.
Some more errors will appear running the program as Tr seems to be an array. You need element-wise operations here. Until you know you want matrix operations, you can simply replace all * by .*, all / by ./ and all ^ by .^ (the dots indicate element-wise operations).
What really surprises me is the fact that the use of the globals Pr and Tr seems to be part of the task. Is that really what your teacher wants you to do?
2 Comments
Michael Haderlein
on 1 Apr 2015
Did you have a look on James' link? Right at the beginning it says:
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3) Show what you have attempted so far and if you have got:
- an error then post the whole error message. We need ALL the red text, not just a small part snipped out of it. This means line numbers, actual lines of code that generated the error, traceback to prior functions, etc. - everything that is in red color.
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