Engineering Matlab Problem Solving phần 7 docx
Engineering Matlab Problem Solving phần 7 docx
... script is:
0 25.0000
10.0000 18.9811
20.0000 15. 377 3
30.0000 13.2196
40.0000 11.9 277
50.0000 11.1542
60.0000 10.6910
70 .0000 10.4138
80.0000 10.2 477
90.0000 10.1483
100.0000 10.0888
The resulting ... 2.2×10
−16
,
resolving the divide-by-zero problem.
>> x = x + (x==0)*eps
x=
-1.0000 -0.66 67 -0.3333 0.0000 0.3333 0.66 67 1.0000
>> sin(x)./x
ans =
0.8415 0.9 276 0.9816...
Engineering Matlab Problem Solving phần 3 docx
... .2*pi .3*pi .4*pi .5*pi .6*pi .7* pi .8*pi .9*pi pi]
x=
Columns 1 through 7
0 0.3142 0.6283 0.9425 1.2566 1. 570 8 1.8850
Columns 8 through 11
2.1991 2.5133 2.8 274 3.1416
Matlab functions can be applied ... AF*sin(15*pi/180)/sin(E*pi/180)
DE=CF-CD-EF
The displayed results from Matlab:
AC =
490.0000
D=
105
CD =
253.64 27
CF =
946.6 073
F=
30
56
Exponential Representation: The base of...
Engineering Matlab Problem Solving phần 1 doc
... our
observations.
7
Section 1
Engineering Problem Solving
Engineering often involves applying a consistent, structured approach to the solving of problems.
A general problem- solving approach and ... most basic Matlab command is the mathematical expression, which has the following prop-
erties:
15
Contents
1 Engineering Problem Solving 1
1.1 Problem- SolvingProcess 1
1...
Engineering Matlab Problem Solving phần 2 pptx
... absolute difference |x − y| is called the roundoff error.
27
For example:
>> format long
>> 5 .78 / 57. 13
ans =
0.101 172 763 871 87
>> format short
>> ans
ans =
0.1012
Thus, the ... supported by Matlab.
Two Matlab functions, realmax and realmin, display the largest and the smallest numbers,
respectively, that can be represented:
>> realmax
ans =
1 .79 77e+...
Engineering Matlab Problem Solving phần 4 pptx
... figure. The command figure(n)
97
>> x=(0:0.1:1)*pi
x=
Columns 1 through 7
0 0.3142 0.6283 0.9425 1.2566 1. 570 8 1.8850
Columns 8 through 11
2.1991 2.5133 2.8 274 3.1416
As in addressing, (0:5) ... example:
>> x=linspace(0,pi,11)
x=
Columns 1 through 7
0 0.3142 0.6283 0.9425 1.2566 1. 570 8 1.8850
Columns 8 through 11
2.1991 2.5133 2.8 274 3.1416
In this example:
increment =...
Engineering Matlab Problem Solving phần 5 pdf
... evaluate the polynomial at the roots:
>> P= polyval(p,r)
P=
1.0e-013 *
-0.0355+ 0.1 377 i
-0.0355- 0.1 377 i
0. 071 1
While P (r) is not exactly zero, due to the limitations on numerical accuracy, for ... elements
of each column of the matrix.
>>B=[-1 170 ;-3558;144-8]
B=
-1 170
-3558
144-8
>> min(B)
ans =
-3 1 4 -8
>> max(B)
ans =
1 578
Example 7. 1 Minimum cost ta...
Engineering Matlab Problem Solving phần 8 ppsx
... that rows become columns and columns become
rows. For example:
>>A=[21;54 ;79 ]
1 87
A=
21
54
79
>>B=A’
B=
2 57
149
Identity Matrix
An identity matrix is a matrix with ones on the main diagonal ... A
Confirming
>> A = [1 2 3;4 5 6 ;7 8 9]
A=
123
456
78 9
>> I = eye(3)
I=
100
010
001
>> I*A
ans =
123
456
78 9
>> A*I
ans =
123
456
78 9
Matrix Inverse
T...
Engineering Matlab Problem Solving phần 9 pot
... script:
a=
20.8286 3 .76 19
err =
3 .76 19 4.5905 -14.5810 -1 .75 24 10. 076 2 -2.0952
MSE =
59.4698
RMSE =
7. 71 17
Thus, the best linear fit is
ˆy =20.8286x +3 .76 19
and the root mean squared error is 7. 71, lower ... 3
0000
1202552
2606290
368 679 1
477 8293
5 110 103 96
Storing this data in a matrix and interpolating at the time 2.6 seconds:
>> x = (0:5)’;
>> y(:,1) = [0,2...
Engineering Matlab Problem Solving phần 10 ppsx
... is a forward
difference approximation.
% Generate noisy data
x = 0:0.1:1;
y = [-0.4 47 1. 978 3.28 6.16 7. 08 7. 34 7. 66 9.56 9.48 9.30 11.2];
% 2nd degree curve fit
a = polyfit(x,y,2);
xi = linspace(0,1,101);
yi ... number.
Examples:
>> t = clock
t=
1998 6 10 10 18 59. 57
>> date
ans =
10-Jun-1998
>> format long
>> d = now
d=
7. 299164 376 449 074 e+005
The date...
A Guide to MATLAB for Chemical Engineering Problem Solving phần 1 docx
... instructor.
Matlab Guide: ChE465
KDH v.2.1.1 p. 11 Print date: 10/4/00
row vector in decreasing power)
a =
3 2 5
»b = [19 -7 -13]
b =
19 -7 -13
»conv(a,b)
ans =
57 17 42 -61 -65
Answer:
57X
4
... times you may
see Matlab referred to as: Matlab, Matlab/ S, Matlab/ Simulink, or just Simulink.
Don't let this confuse you, in each case you are still using Matlab.
WHERE TO...
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