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Homework 7
Geog210a
Due: November 18, 2011
Problems from text
(check using MATLAB when appropriate):
12.6.4, 12.6.6, 12.6.10, 12.6.12, Chap12 review problems 11, 12, 14, 10.1.13, 10.1.17, 10.1.22,
10.1.25, 10.2.3, 10.2.5, 10.2.12, 10.2.17, 10.3.1, 10.3.5, 10.3.6, 10.3.9
DV Problems:
1.
Solve these systems of linear equation using Gaussian elimination.
Please solve these by hand and
check your answers using MATLAB.
a. 6 x
+
2 y
+
7 z
= 13
3 y
+
5 z
=
5
2 x

y
+
z
=
3
b.
3x
1
+
2x
2
 2 x
3

2x
4
=
3
2x
1
+
x
2
 x
4
=
1
x
1
– 2 x
3
+ x
4
=
1
2x
1
 x
2
+ 3 x
3

x
4
=
3
2. Waldo has been asked you fit a quadratic trend surface for the elevation data given below.
Waldo
seems to think that a model of the form,
h(x,y) = a + b x + c y + d x
2
+ e y
2
+ f x y
,
will work well where h(x,y) is in feet and x and y in miles.
BTW, the data locations for the
elevation observations were largely based on the location of pubs.
x (miles)
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This note was uploaded on 12/28/2011 for the course GEOG 210a taught by Professor Davey during the Fall '09 term at UCSB.
 Fall '09
 Davey

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