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Lecture 8

# Lecture 8 - Lecture 8 User-defined functions(continued BMEn...

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11/1/2010 1 Lecture 8: User-defined functions (continued) BMEn 2401 Programming for Biomedical Engineers Rich Beck November 2, 2010 1 Today’s lecture Review of User-defined function Using functions in one file Recursive functions 2

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11/1/2010 2 Review: Functions % Script grade_vec = [10 10 7 8 10 9]; my_median1 = median(grade_vec) 1. MATLAB calls function (ex. median ) 2. Values of input variable(s) passed to function (ex. x = [10 10 7 8 10 9] , dim = [] ) 3. Algorithm in function uses input(s) to determine output(s) (ex. x barb2right y ) 4. Values of output variable(s) passed to function (ex. y = 9.5 ) To view median.m, in MATLAB editor, Open barb2right C:\Program Files\MATLAB\R2009b\toolbox\matlab\datafun\median.m 3 function y = median(x,dim) MATLAB Built-in Function median Review: Functions % Script grade_vec = [10 10 7 8 10 9]; tot_grade1 = MySum(grade_vec) NOTES: Variables used in the function call do not need the same variable names as variables in the function (true of both built-in & user-defined functions). This example: grade_vec and V different variable names, same values. However, the variable names in the first line of the function (function declaration line) must be used within the function . This example: input V used to calculate the output variable sum . 4 function sum=MySum(V) sum=0; for i=1:length(V) sum=sum+V(i); end Function MySum from HW 6
11/1/2010 3 Multiple Inputs/Outputs The order of variables in the function call and the function declaration line must be the

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Lecture 8 - Lecture 8 User-defined functions(continued BMEn...

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