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Introduction to write programs in MATLAB

This course, held on September 25, 2006, provides a comprehensive introduction to programming in MATLAB, focusing on ecological modeling. Participants will learn about the programming environment, data types, and essential input/output operations. The course covers fundamental programming concepts such as scalars, vectors, and matrices, and demonstrates how to implement equations and algorithms for forward analysis. Key examples include conditional statements and the Fibonacci sequence. Additionally, students will develop a two-species model to simulate species dynamics based on specified equations.

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Introduction to write programs in MATLAB

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  1. Introduction to write programs in MATLAB Ecological Modeling Course Sep 25, 2006

  2. Review for the last class • Introduction to the Programming environment (a) MATLAB windows (b) Data types (c) Input and Output data

  3. Technical route Input Output Central Model • Scalar • Vector • Matrix • Scalar • Vector • Matrix • Equations • Algorithm Forward analysis

  4. Data input • Assignment statement: e.g. A=6; B=[1; 2; 3; 4; 5; 6; 7; 8; 9]; C=[1 2 3; 4 5 6; 7 8 9];

  5. Data output: • Plot statement: e.g. plot(x,y);title(‘example’);xlabel(‘x axis’);ylabel(‘y axis’);

  6. Central programs: Conceptual model Mathematical equations Computer language

  7. (a) Simple calculation • Add • Subtract • Multiply • Divide

  8. Example I: • Simple equations

  9. (b) Conditional statement

  10. Example II: • Discontinuous function

  11. Example III: Photosynthesis rate

  12. (c) Repetition statement

  13. Example IV: • Fibonacci number 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, …… Number 1000 =

  14. Example V: • Differential equation

  15. Homework: Based on Equation (3.1) and (3.2) (Page 5) & initial values in Figure 2 legend (Page 8) • Develop two-species model to simulate species abundance dynamics and Generate figure 2

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