r3_yun_solution - %% Exercise 4 [maximum, column] = max(x')...

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%% Problem 1 n = 1:50; gamma = 0.5772156649; hn = cumsum(1./n); fn = gamma + log(n); gn = gamma + log(n) + 1./(2*n); hn_fn = abs(hn - fn); hn_gn = abs(hn - gn); figure(1) plot(n,hn,'b',n,fn,'r') figure(2) plot(n,hn,'b',n,gn,'r') figure(3) plot(n,hn_fn,'b',n,hn_gn','r') %% Practice Exercise 3.2 %% Problem 1 x= -2:1:2; abs(x) sqrt(x) %% Problem 2 %a sqrt(-3) sqrt(3) %b % nthroot(-3,2) Does not work because n must be odd if x is negative nthroot(3,2) %c -3^(1/2) 3^(1/2) %% Problem 3 x=-9:3:12 x/2 rem(x,2) %% Problem 4 exp(x) %% Problem 5 %a log(x) %b log10(x) %% Problem 6 sign(x) %% Problem 7 format rat x/2 format short % returns the format to the default
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% Practice Exercises 3.4 %% Exercise 1 theta = 3*pi; sin(2*theta) %% Exercise 2 theta = 0:0.2*pi:2*pi; cos(theta) %% Exercise 3 asin(1) %% Exercise 4 x = -1:0.2:1; acos(x) %% Exercise 5 % a cos(45*pi/180) cosd(45) %% Exercise 6 asin(0.5) %% Exercise 7 cscd(60) % Practice Exercises 3.5 x = [4 90 85 75; 2 55 65 75; 3 78 82 79; 1 84 92 93] %% Exercise 1 max(x) %% Exercise 2 [maximum, row] = max(x) %% Exercise 3 max(x')
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Unformatted text preview: %% Exercise 4 [maximum, column] = max(x') %% Exercise 5 max(max(x)) % or max(x(:)) % Practice Exercises 3.6 x = [4 90 85 75; 2 55 65 75; 3 78 82 79; 1 84 92 93] %% Exercise 1 mean(x) %% Exercise 2 median(x) %% Exercise 3 mean(x') %% Exercise 4 median(x') %% Exercise 5 mode(x) %% Exercise 6 mean(mean(x)) % or mean(x(:)) % Practice Exercises 3.7 x = [4 90 85 75; 2 55 65 75; 3 78 82 79; 1 84 92 93] %% Exercise 1 size(x) %% Exercise 2 sort(x) %% Exercise 3 sort(x, 'descend' ) %% Exercise 4 sortrows(x) %% Exercise 5 sortrows(x,-3) % Practice Exercises 3.9 %% Exercise 1 rand(3) %% Exercise 2 randn(3) %% Exercise 3 x = rand(100,5); %% Exercise 4 max(x) std(x) var(x) mean(x) %% Exercise 5 x = randn(100,5); %% Exercise 6 max(x) std(x) var(x) mean(x) %% Problem 3.21 %a T=randn(1,121)*2+70; t=0:120; %b plot(t,T) %c [maximum, element]=max(T) max_Temp_time=t(element) [minimum, element]=max(T) min_Temp_time=t(element) %%...
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This document was uploaded on 11/04/2011 for the course ENGINEERIN 440 at Rutgers.

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r3_yun_solution - %% Exercise 4 [maximum, column] = max(x')...

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