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Old 11-11-2012, 05:53 PM   #11 (permalink)
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Alright, well I'm working on some engineering assignments of my own which I should have finished up in 30 or so minutes, after that I'll take a better look at your code.

Also, what are you plotting against what to create your plots? Do you only ever plot x and y or do you plot t, z and g also?
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Old 11-11-2012, 06:00 PM   #12 (permalink)
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the graph would have to be a plot of the distance of the heat fin againts the y-value which is (t-tsurr)/(tb-tsurr). G is jst the solution vector of the z matrix.
-Duncan
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Old 11-11-2012, 07:32 PM   #13 (permalink)
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Quote:
Originally Posted by dkv23 View Post
the graph would have to be a plot of the distance of the heat fin againts the y-value which is (t-tsurr)/(tb-tsurr). G is jst the solution vector of the z matrix.
-Duncan
Okay, so y = (t-tsurr)/(tb-tsurr) where tb and tsurr are constants, meaning y is only dependent on t

On line 33 of your code you generate a column vector of zeros called t which is what I'm guessing your storing your t values in, but this column vector t does not turn up anywhere in your code again, by chance you replace it with z or g in your code?
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Old 11-11-2012, 08:09 PM   #14 (permalink)
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no I did not replace it with either g or z, I just did not use it again as it was unnecessary as the general shape of the graph should be the same whether y or t is used.
-Duncan
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Old 11-11-2012, 11:01 PM   #15 (permalink)
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O'lane thanks for the help, I found the problem in the section t o build the matrix between the boundaries I had the signs reversed.
-Duncan
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