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382754783金蟲(chóng) (小有名氣)
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[求助]
Matlab 三維制圖顯示錯(cuò)誤
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>> syms x y z [x,y]=meshgrid(-30:0.1:30); z =1./(1 - 1/17903395057303560747995139200774466990785173651456000000000000*(x.^2).*(- 40677029284028334080*(x.^7) + 319456229981526228992*(x.^6) + 20944845745188058955776*(x.^5) - 159303762685264924770304*(x.^4) - 5783991953986077457383424*(x.^3) + 18321334501814910626824192*(x.^2) + 1084508037958266771931660288*x + 49909327088249939961061572608).^2).^(1/2)./((3889921127746483/3602879701896396800000)*(x + 9).^4 - (7474332468290957/57646075230342348800000)*(x + 9).^5 + (4956363431444651/922337203685477580800000)*(x + 9).^6 - (2269923509153367/29514790517935282585600000)*(x + 9).^7 + 247/25000) - ((1/(3889921127746483/3602879701896396800000)*(x + 9).^4 - (7474332468290957/57646075230342348800000)*(x + 9).^5 + (4956363431444651/922337203685477580800000)*(x + 9).^6 - (2269923509153367/29514790517935282585600000)*(x + 9).^7 + 247/25000).^2 - (x./(4568343288821643697192960*(x + 9).^4 - 548618394958946096906240*(x + 9).^5 + 22737416369020965355520*(x + 9).^6 - 325416234272226693120*(x + 9).^7 + 41804654842273876861339566080).*(- 40677029284028334080*(x.^7) + 319456229981526228992*(x.^6) + 20944845745188058955776*(x.^5) - 159303762685264924770304*(x.^4) - 5783991953986077457383424*(x.^3) + 18321334501814910626824192*(x.^2) + 1084508037958266771931660288*x + 49909327088249939961061572608)).^2 - y.^2).^(1/2); mesh(x,y,z); xlabel('x-axis');ylabel('y-axis');zlabel('z-axis'); title('Surface ') ??? Error using ==> mesh at 80 X, Y, Z, and C cannot be complex. |

金蟲(chóng) (小有名氣)

鐵桿木蟲(chóng) (正式寫(xiě)手)
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這個(gè)報(bào)錯(cuò)很明顯了,說(shuō)明你x和y的取值導(dǎo)致z有復(fù)數(shù)啊,也就是說(shuō)你的多項(xiàng)式里根號(hào)下有負(fù)數(shù)。檢查x和y的取值范圍,重新算吧。 發(fā)自小木蟲(chóng)Android客戶(hù)端 |
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