Which format can be choosen

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MINATI PATRA 2021-6-3

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https://ww2.mathworks.cn/matlabcentral/answers/847130-which-format-can-be-choosen

评论： MINATI PATRA 2021-6-4

syms x

f = - 0.00000000000000000000000044574112852848068606808271927672*x^21 + 0.0000000000000000030044127779970749176557242324773*x^20 - 0.000000000056302615985881136490640044463735*x^19 + 0.00000000000017378935724165993341192746035199*x^18 - 0.0000000014891215183454938397421269093944*x^17 + 0.00000001363607885771973858689574596145*x^16;

%% Can it be possible to express the above expression in exponential form

(e.g 0.00000001363607885771973858689574596145 = 1.3636 * 10^(- 8) )

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Answer 1

Steven Lord 2021-6-3

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https://ww2.mathworks.cn/matlabcentral/answers/847130-which-format-can-be-choosen#answer_716055

在 MATLAB Online 中打开

syms x

f = - 0.00000000000000000000000044574112852848068606808271927672*x^21 + 0.0000000000000000030044127779970749176557242324773*x^20 - 0.000000000056302615985881136490640044463735*x^19 + 0.00000000000017378935724165993341192746035199*x^18 - 0.0000000014891215183454938397421269093944*x^17 + 0.00000001363607885771973858689574596145*x^16

f =

vpa(f, 5)

ans =

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MINATI PATRA 2021-6-4

Hi Steven

Thanks for your help but it is not working for the following expression: (Some parts are not accurate)

Fv = - 4.4574e-25*x^21 + 3.0044e-21*x^20 - 5.6303e-17*x^19 + 1.7379e-13*x^18 - 1.4891e-9*x^17 + 1.3636e-8*x^16 - 2.8806e-9*x^15 - 2.0262e-7*x^14 - 7.3855e-8*x^13 - 4.8971e-7*x^12 + 0.000011088*x^11 + 0.000021129*x^10 - 0.000080694*x^9 + 0.00010399*x^8 - 0.0011636*x^7 - 0.010797*x^6 - 0.00084088*x^5 - 0.2542*x^4 + 0.1897*x^3 - 2.0757*x^2 + 0.78487*x + 0.078487;

%% And Can it be arranged in ascending order (Please help!)

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