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Iaw*e-r-.-*u,-*u-fsa*a*w4ana绘制直方图X=randn(10(X),1;subplo(1,2,1hist(x:sublot(1,2.2：hist(x.8:2503002(X)25()2(M)15()150I(X)lurf(f.domainm绘制符号函数的等值线。绘制函数f(x,y3(x2ex2(yI22222xI10(x3y5exye(xIy53synsXy:f=3*(1-xA2*exp-(xA2-(y+12.-10e(x/5-xA3-yA5*exp(-xA2-yA2.-l3*exp(-(x+12y2:subplot(1.2.1:ezcontour(fj-3.3|.49：title(coniour：sbplot(1.2.2zcontorf(f,-3,3.49;titlc(flllcdcontour;contour33filledcontour221100y-Iy-20x2-1-2-2-3-3-20x29.矢量图：qivcr(x.y,u,v绘制矢量像(x,y是坐标，(u,v是待绘制的矢量n=-2:0.2:2;X,Y.Z=peaks(n;contour(X,Y,Z,0;(U,V=gradient(Z,().2:holdonquiver(X.Y.U.V;contour32i.521I0.500.0.5-1-1-2-1.5-3-2-2y-20x2-10I2
