MATLAB Demystified phần 4 pptx
MATLAB Demystified phần 4 pptx
...
frequency:
raw =
Columns 1 through 18
17 17 18 21 21 21 24 26 28 28
28 28 31 31 33 34 34 37
Columns 19 through 26
37 37 39 40 40 43 43 43
So we have replaced the approach we used in the last ... [11,12,16,23, 24, 29];
>> mean(a)
ans =
19.1667
We can pass an array to mean and MATLAB will tell us the mean of each
column:
>> A = [1 2 3; 4 4 2; 4 2 9]
A =
1 04...
Accounting Demystified phần 4 pptx
... 08-29-03 08:31: 14 PS
49
Accounts Receivable
FIGURE 7 -4
(A) (B) (C)
Allowance Allowance Allowance
Current balance 100 40 0 300
Entry needed 160 140 560
Desired balance 260 260 260
$ 140 ; see Example ... 250 units that cost $40 each
1/09/02 Inventory 84, 000
Accounts payable 84, 000
To record purchase of inventory
(2,000 units ן $40 )
1/10/02 Cost of goods sold 40 ,000
Inventory 40 ,0...
MATLAB Demystified phần 2 pptx
... magic(8)
ans =
64 2 3 61 60 6 7 57
9 55 54 12 13 51 50 16
17 47 46 20 21 43 42 24
40 26 27 37 36 30 31 33
32 34 35 29 28 38 39 25
41 23 22 44 45 19 18 48
49 15 14 52 53 11 10 56
8 58 59 5 4 62 63 ... det(S) ≠ 0, the inverse must exist. MATLAB spits it out for us:
>> T = inv(S)
T =
–0.9259 0 .48 15 0 .48 15 0.1111
–0.6296 0.15 74 0.65 74 0.0556
–0.5926 0....
Accounting Demystified phần 10 pptx
... company,
1 14 115, 117
purchases journal, 133
quick ratio, 146 , 148
ratio analysis, 143 – 149
defined, 145
efficiency ratios, 146 – 147 ,
148
horizontal analysis, 144 – 145
liquidity ratios, 146 , 148
normalizing ... on assets, 147 – 148
types of, 30–31
asset sale, 82– 84
asset turnover ratio, 146 – 147 ,
148
authorized shares, 101, 102
bad debt expense, 47 48 , 49 , 50
bad debts,...
Engineering Matlab Problem Solving phần 4 pptx
... 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
−2
0
2
4
6
8
10
12
Multiple Axis Plot
x
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
−10
0
10
20
30
40
50
60
Figure 5.3: Plot with two polynomial curves, ... is used to separate rows.
>>f=[123 ;45 6]
f=
123
45 6
>>g=f’
g=
14
25
36
>>h=[123
45 6
789]
h=
123
45 6
789
88
>> F = 3.0.^A
F=
9 243 729
Array-array mathematics on other than ......
MATLAB Demystified phần 1 pps
... Pseudoinverse 39
Reduced Echelon Matrices 44
Matrix Decompositions 45
Quiz 47
CHAPTER 3 Plotting and Graphics 49
Basic 2D Plotting 49
More 2D Plotting Options 54
The Axis Commands 57
Showing Multiple ... 1.22 14 1. 349 9 1 .49 18 1. 648 7
1.8221 2.0138 2.2255 2 .45 96
Column 11
2.7183
Or we could have y = x
2
:
>> y = x^2
y =
Columns 1 through 10
0 0.0100 0. 040 0 0.0900...
MATLAB Demystified phần 3 ppt
... image shown in Figure 3 -42 .
Figure 3 -40 Our first call to contour3 for z = cos(x)sin(y)
Figure 3-39 A contour map of z = cos(x)sin(y) with −5 ≤ x ≤ 5, −3 ≤ y ≤ 3
82
MATLAB Demystifi ed
what ... 3-1 MATLAB specifiers for selecting plot colors.
Color Specifier
White w
Black k
Blue b
Red r
Cyan c
Green g
Magenta m
Yellow y
80
MATLAB Demystifi ed
Now we can plot the data, and tell M...
MATLAB Demystified phần 5 pps
... 5-6.
−10 −8 −6 4 −2
0 2 4 6 8 10
0
1000
2000
3000
40 00
5000
6000
7000
8000
9000
10000
x
x
4
− 5x
3
+ 4x
2
− 5x + 6
Figure 5-6 Plot of the function x
4
− 5x
3
+ 4x
2
− 5x + 6
126
MATLAB Demystifi ... –1
–1
−6 4 −2 0 2 4 6
−5
0
5
10
15
20
25
30
35
40
45
x
x
2
+ x − 2
1/2
Figure 5-5 A plot of the quadratic equation solved in Example 5-1
144
MATLAB Demystifi ed
Quiz...
MATLAB Demystified phần 6 pps
...
Figure 6 -4 A plot of
f (x) = x
3
– 3x
2
+ 3x
0 0.2 0 .4 0.6 0.8 1 1.2 1 .4 1.6 1.8 2
0
0.2
0 .4
0.6
0.8
1
1.2
1 .4
1.6
1.8
2
x
x
3
− 3x
2
+ 3x
1 64
MATLAB Demystifi ed
SOLUTION 6-8
Using MATLAB ...
182
MATLAB Demystifi ed
0.5597
0. 648 0
0.6907
0.6050
0 .45 33
0.31 64
0. 241 4
0.2129
The errors are quite small in this case. The largest error is:
>> emax =...
MATLAB Demystified phần 7 docx
...
206
MATLAB Demystifi ed
−20 −15 −10 −5 0 5 10 15 20
−0 .4
−0.2
0
0.2
0 .4
0.6
0.8
1
x
sin(x)/x
Figure 8-3 A plot of the sinc function
−6 4 −2 0 2 4 6
0
0.2
0 .4
0.6
0.8
1
x
sin(x)
2
/x
2
Figure 8 -4 ...
2 14
MATLAB Demystifi ed
The actual, analytic answer is:
>> ac = sqrt(pi)
ac =
1.77 245 385090552
Our relative error is:
>> d = ac – est;
>> err = abs(d/ac)*100...
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