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matlab教程課后作業(yè)(已修改)

2025-09-02 12:39 本頁(yè)面
 

【正文】 【】圖示復(fù)數(shù)的和。z1=4+3*i。z2=1+2i。z12=z1+z2clf,hold onplot([0,z1,z12],39。b39。,39。LineWidth39。,3)plot([0,z12],39。r39。,39。LineWidth39。,3)plot([z1,z12],39。ob39。,39。MarkerSize39。,8)hold off,grid onaxis equalaxis ([0,6,0,6])text(,39。z139。)text(5,39。z239。)text(,39。z1239。)xlabel(39。real39。)ylabel(39。image39。)shg z12 = + 【】 用MATLAB計(jì)算能得到 –2 嗎?a=8。r_a=a^(1/3)p=[1,0,0,a]。R=roots(p)MR=abs(R(1))。t=0:pi/20:2*pi。x=MR*sin(t)。y=MR*cos(t)。plot(x,y,39。b:39。),grid onhold onplot(R(2),39。.39。,39。MarkerSize39。,30,39。Color39。,39。r39。)plot(R([1,3]),39。o39。,39。MarkerSize39。,15,39。Color39。,39。b39。)axis([3,3,3,3]),axis squarehold off r_a = + R = + 【】畫出衰減振蕩曲線,的取值范圍是。t=0:pi/50:4*pi。y=exp(t/3).*sin(3*t)。plot(t,y,39。r39。,39。LineWidth39。,2)axis([0,4*pi,1,1])xlabel(39。t39。),ylabel(39。y39。) 習(xí)題3,先運(yùn)行指令A(yù)=magic(3), B=[1,2,1。3,4,3。5,6,7], C=reshape(1:6,3,2)生成陣列,,然后根據(jù)運(yùn)行結(jié)果回答以下問題: (1)計(jì)算A*B, B*A,這兩個(gè)乘積相同嗎?(2)計(jì)算A\B, B/A,左除、右除結(jié)果相同嗎?(3)計(jì)算B( : ,[1,2]).*C和C.*B( : , [1,2]),這兩個(gè)乘積相同嗎?(4)計(jì)算A\A和A.\A,這兩個(gè)計(jì)算結(jié)果相同嗎?(5)計(jì)算A\eye(3)和inv(A),這兩個(gè)計(jì)算結(jié)果相同嗎?(提示:根據(jù)對(duì)計(jì)算結(jié)果的目測(cè)回答問題)A=magic(3), B=[1,2,1。3,4,3。5,6,7], C=reshape(1:6,3,2) A = 8 1 6 3 5 7 4 9 2B =
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