Engineering 102 Final Exam Already Passed

Engineering 102 Final Exam Already Passed == equal to = greater than or equal to = less than or equal to ~= not equal to if statements if elseif else end && and || or input function x=input('enter number of whatevern') fprintf fprintf('the number of apples is %.1fn', x) x=number of apples clc clears command window clear clears workspace custom functions [output,output]=functionname(input,input) function [output,output]=functionname(input,input) %functionname is a function that does this %input arguments are &output arguments are equations that convert end sin(#) sine in radians sind(#) sine in degrees string b='Paige' fprintf('my name is %sn', b) d=[1 2 3 4 5] 1 x 5 vector 1 row 5 columns d=[1 2 3 4 5; 1 2 3 4 5] 2 x 5 matrix 2 rows 5 columns h=[1 2 3 4 5] h(3) displays the 3rd number, 3 h=[1 2 3; 12 14 12] h(2,2) displays number in 2nd row, 2nd column, number 14 add numbers to a vector h=[1 2 3 4 5 6] h(8)=8 will show up: h= 1 2 3 4 5 6 0 8 vector=[x:y:z] x=first number y=increment z=last number linspace command for vectors linspace(first number, last number, number of elements) mean(x) average of x if x is a vector, length(x) displays the number of elements in the vector Matrix(r,c) r=row # c=column # Matrix [vector; vector; vector] use . when multiplying, dividing, raising to an exponent matrices subplotting (2 plots 1 figure) figure x=1:1:10 y1=x+2 y2=x+3 subplot(2,1,1) %2 by 1 matrix of plot 1 plot(x,y1) xlabel('x') ylabel('y1') title('y vs x') grid subplot(2,1,2) %2 by 1 matrix of plot 2 plot(x,y2) xlabel('x') ylabel('y2') title('y vs x') grid plotting one figure x=1:1:10 y=x+2 plot(x,y) xlabel('x') ylabel('y') title('y vs x') grid plotting 2 lines in 1 figure figure x=1:1:10 y1=x+2 y2=x+3 hold on plot(x,y1) plot(x,y2) hold off add labels and grid y=zeros(2,3) displays a 2 row 3 column matrix of 0s y=ones(3,4) displays a 3 row 4 column matrix of 1s y=4*ones(3,5) displays a 3 row 5 column matrix of 4s axis on plots axis([xmin,xmax,ymin,ymax]) for loops for vector (number of times it will run) commands (ex. equations or disp) end for a=1:4 y(a)=a+2 end disp(y) will display a vector y=[3 4 5 6] p=1 for x=[1 2 3 4 5] y(p)=x+2 p=p+1 end disp(y) disp(x+1) y= [3 4 5 6 7] 6 while end loops a=1 while a=5 disp('wvu') a=a+1; end wvu will display 5 times randi function randi(2,3) creates 2 rows 3 column matrix of random (integer) numbers randi([3,9],2,3) creates 2 row 3 column matrix of numbers 3 through 9 nested for-end loops m=[1 2 3 4; 5 6 7 8] for r=1:2 %rows 1-2 for c=1:4 %columns 1-4 if m(r,c)6 %if any number is less than 6 m(r,c)=100 %replaces the number with 100 end end end disp(M) basically, replaces any number less than 6 with 100 while loop example of how many times the number was something g=[1 2 3 4 5 6 7] p=1; %position in vector counter=0 while p=length(g) if g(p)=4 counter=counter+1 end p=p+1; end counter equals the number of times g was larger or equal to 4 m=[1 2 3 4 5 6] x=length(m) what does x equal x=6 series problem m=input('Enter the number of terms in the seriesn'); sum=0; for n=0:m term=((-1/3)^n)/(2*n+1); sum=sum+term; end final=sqrt(12)*sum for vs while loops use for when you know how many times you want to run the loop 3D plotting figure t=1:1:10 x=t+1 y=t+2 z=t+3 plot3(x,y,z) grid xlabel('x') ylabel('y') zlabel('z') symbolic math syms x y z before ALL symbolic math equations syms x int(x) integrates equation x syms x y [output, output]=solve('equation, equation') [x,y]=solve('3*x=7, 4/6*x=90') solves multiple equations syms x factor(x^2-2*x+3) factors equation p=[1 2 3 5 6 7; 2 3 4 6 8 8] p(1,2)=[10] replaces the number in row 1 column 2 with the number 10 h=[1 2 3; 4 5 6] h(:,2)=[] deletes the numbers in row 1 column 2 therefore it will display h=[1 3; 4 6] exp(10) on matlab equals e^10 log(10) on matlab equals ln(10) log10(200) on matlab equals log(200)