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CS 170 – Intro to Scientific and engineering Programming

CS 170 – Intro to Scientific and engineering Programming. Built-in MATLAB functions. math: sum, prod, mean, std , abs, sqrt , sin, cos, abs , exp , min, max logical: any, all, and, or, not creation: linspace , colon, ones, zeros dimensions: size, length

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CS 170 – Intro to Scientific and engineering Programming

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  1. CS 170 – Intro to Scientific and engineering Programming

  2. Built-in MATLAB functions • math: sum, prod, mean, std, abs, sqrt, sin, cos, abs, exp, min, max • logical: any, all, and, or, not • creation: linspace, colon, ones, zeros • dimensions: size, length • graph/display: plot, figure, subplot, xlabel, ylabel, • title, axis, legend, imshow, imtool • input/output: input, disp

  3. Big idea: Abstraction

  4. The other side of the contract • We’ve been using functions built by others - let’s try writing a few of our own • Implement a myMeanfunction that returns a single value representing the average value of a vector or matrix

  5. Executing a function

  6. Invoke myMean function

  7. Arguments!

  8. Try another one? • Write a function to draw a circle • Think first about the contract: • use inputs to control appearance: radius, location, color, markers, line style, line width • Call the new function drawCircleand store it in an M-File named drawCircle.m

  9. Questions??

  10. Resources • Lecture slides CS112, Ellen Hildreth, http://cs.wellesley.edu/~cs112/

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