Matlab 2007/12/04

OutlineMatlab2D

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MatlabAddition:+Sudtraction:-Multiplication:*Division: / or \ (21.9/3 or 3\21.9)Exponentiation: ^ 34=3^4abs abs-1sqrt

sin(t)asin(t)exp(t)log(t)10log10(t)

a * b a .* b

2D--plotplot (,)

2Dxlabel(name ) xylabel(name) ytitle(name)

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->>x=0:2:8x= 0 2 4 6 8>>y=sqrt(x)y= 0 1.4142 2.0000 2.4495 2.8284

->>gradient(y,x)ans = 0.7071 0.5000 0.2588 0.2071 0.1895 yx=0,0.7071yx=2,0.5000yx=4,0.2588yx=6,0.2071yx=8,0.1895

->>x=linspace(0,2*pi,36);>>y=sin(x);>>dy=gradient(y,2*pi,36);>>plot(x,y,x,dy);legend('sin(x)','d sin(x)/dx')>> Interp1(x,dy,2,'spline')>>cos(2)

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-plot(x,y,x,dy,x,cos(x));legend('sin(x)','d sin(x)/dx','cos(x)')

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->>diff([3 5 9 4 1])ans = 2 4 -5 -3>>x=0:0.2:6;>>y=x.*sin(x); >>dy=diff(y)./diff(x);>>plot(x,y,x(1:end-1),dy);legend('y(x)','dy/dx')

->>plot(x,dyt,x(1:end-1),dy);legend('exact','approx')

>>dy2 = gradient(y,0.2);>>plot(x,dyt,x,dy);legend('exact','approx')

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gradient

Midtermlimit functionAA+:A96325122_lab3BB+:B96325122_lab3

ReferenceMATLAB7