**build data**quickly, as follows:

**-Building data-elements that have been determined.**

For example you will build the data x with a known value, then the way of writing as follows:

**i. row vector data:**

>> x = [1 3 5]

x =

1 3 5

**ii. column vector data**

>> x=[1;3;5]

x =

1

3

5

**iii. for the data matrix form**

>> x = [1 3 5;2 4 6]

x =

1 3 5

2 4 6

x =

1 3 5

2 4 6

**-Build data with initial boundary and final boundary.**

Suppose you want to create a data point from the point of 10 degrees to 15 degrees, then the way the writing is as follows:

>> ang = [10:15]

ang =

10 11 12 13 14 15

**-Establish initial boundary data, increment and final boundary**

Suppose you want to create a data point from the point of 10 to 50 degrees with a 10 increase, then the way its writing is as follows:

>> ang = [10:10:50]

ang =

10 20 30 40 50

ang =

10 20 30 40 50

**-Establish initial boundary data and the deadline, but the amount of data specified**

Suppose you want to make 5 pieces of data in the interval angle angle 30 degrees to 70 degrees, then the way his writing is as follows:

>> ang = linspace(30,70,5)

ang =

30 40 50 60 70

ang =

30 40 50 60 70

**-Building a logarithmic data with initial boundary and final boundary, but the amount of data specified.**

Suppose you want to create 5 data values within the interval 10 and 100, then the way is as follows:

>> y = logspace(1,2,5)

y =

10.0000 17.7828 31.6228 56.2341 100.0000

**-Establish data using standard MATLAB matrix**

How to create a data matrix with all elements of value 1:

>> x = ones(2,3)

x =

1 1 1

1 1 1

Create a data matrix with all elements of value 0;

>> x = zeros(2,3)

x =

0 0 0

0 0 0

x =

0 0 0

0 0 0

Making identity matrix of data, do the following:

>> x = eye(2,2)

x =

1 0

0 1

x =

1 0

0 1

**-Building Data-Random**

Random data is very often used in programming, particularly the field of mathematical modeling. MATLAB provides a quick way to generate random data as follows:

>> x = rand(3,3)

x =

0.9501 0.4860 0.4565

0.2311 0.8913 0.0185

0.6068 0.7621 0.8214

x =

0.9501 0.4860 0.4565

0.2311 0.8913 0.0185

0.6068 0.7621 0.8214

Seen that the generated random data is in the interval 0 and 1. Then how to generate random data with other intervals, such as intervals 2 and 4?

Here is syntax to generate data with random intervals:

variable = (end-(rand () * (end-start)))

Example of usage in the program are as follows:

>> x = (4-(rand(3)*(7-5)))

x =

3.1106 2.1564 3.1886

2.7691 2.5236 2.1291

2.4161 3.6475 2.1662

## 1 comments:

can i extrapolate any observed data....

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