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Arrays - Introduction. What are arrays? When are they used/useful?. Many examples. Definition: ARRAYS. What? ONE variable that contains MORE THAN ONE value. VECTORS ( 1 D) . MATRICES ( 2 D, 3 D.. ). pressures. velocity. densities. temperatures. When to use arrays.

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Arrays introduction

Arrays - Introduction

What are arrays?

When are they used/useful?

Many examples


Definition arrays
Definition: ARRAYS

  • What?

    • ONE variable that contains MORE THAN ONE value.

VECTORS (1D)

MATRICES (2D,3D..)

pressures

velocity

densities

temperatures


When to use arrays
When to use arrays

  • Data Base (Keep data together)


Examples
Examples

Database

“VECTORS”

Keep the top 5 scores:

Keep the part numbers of a specific Gas Engine:


When to use arrays1
When to use arrays

  • Keep data together (data base)

  • Create data tables (financial analysis…)


Example
Example

Data Tables

“MATRIX”

Financial: Loan Analysis


When to use arrays2
When to use arrays

  • Keep data together (data base)

  • Create data tables (multiplication, sine, cosine, financial analysis…)

  • Study properties of fluids (CFD)


CFD

Shock Waves

Aerodynamics

CFD = Computational Fluid Dynamics

->Solve and analyze problems that involve fluid flows

Shock Waves


CFD

Shock Waves

Aerodynamics

Matrices: Grids or Mesh

T : temperature

P : pressure

u : velocity

: density

Fluid Flow


CFD

Shock Waves

Aerodynamics

Matrices: Grids or Mesh

1st layer : T

2nd layer: P

3rd layer:

4th layer: u

Fluid Flow

Or.. 1 unique 3Dimensional array !!!


When to use arrays3
When to use arrays

  • Keep data together (data base)

  • Create data tables (multiplication, sine, cosine, financial analysis…)

  • Study properties of fluids (CFD)

  • Upload tremendous amount of data from files


Example1
Example

Files

  • Online Data Files can be downloaded & Analyzed


When to use arrays4
When to use arrays

  • Keep data together (data base)

  • Create data tables (multiplication, sine, cosine, financial analysis…)

  • Study properties of fluids (CFD)

  • Upload tremendous amount of data from files

    Etc…


Lessons learned
Lessons Learned

  • What is an array?

  • Difference between “vector” and “matrix”

  • Various examples showing the big pictures of arrays

  • What’s next? Creating arrays using MATLAB!


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