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jixie zhuangbei


Active since 2015

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Error programs，download from mathworks （matlab 2015a）
% SpeedyGA is a vectorized implementation of a Simple Genetic Algorithm in Matlab % Version 1.3 % Copyright (C) 2007, 20...

mer än 9 år ago | 0 answers | 0

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Wrong，all the time（Equation（6） is y(i,6)， not dy(6)）
Equation：dy(1)=-1.918298553*y(3)*y(4)-121.6697369*y(5)*y(2)+0.006472085*y(2)*y(2)+15.25250926*y(5)*y(5)-0.518363603*sin(2.047*t)...

mer än 9 år ago | 1 answer | 0

1

answer

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Where is workspace in matlaB r2015a?
Where is workspace in matlaB r2015a? Thanks!

mer än 9 år ago | 1 answer | 0

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Error，Need some help
In order to solve the equations， I edited 2 M files. In equation (6), X is coefficient which varies with t(t is time) 【ODE4...

mer än 9 år ago | 0 answers | 0

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It should not a error？
<</matlabcentral/answers/uploaded_files/34050/15%E9%94%99.jpg>> 2 M files： ODE45_main file： clc;clear tspan=[0,180...

mer än 9 år ago | 1 answer | 0

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The result of g and h should not contain c
<</matlabcentral/answers/uploaded_files/33800/5.jpg>> g and h are unknown， A curve represent the values of c program： ...

mer än 9 år ago | 1 answer | 0

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Question


The input value can be represented by the values of a curve？
Calculation：z=c.^4+b.^4-c.^2-exp(c+b)-2.*c.*b-b.^2 Here，b=1; A curve represent the values of c <</matlabcentral/answe...

mer än 9 år ago | 1 answer | 0

1

answer

Question


Unable to meet integration tolerances without reducing the step size below t
Warning: Failure at t=5.422028e-006. Unable to meet integration tolerances without reducing the step size below the smallest va...

mer än 9 år ago | 1 answer | 0

1

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Question


MATLAB 7 ， error . How to revise it ？
Error line： y(i,6)=-178075801.6*y(i,4)*y(i,5)+490910.1296*y(i,3)*y(i,2)+1128974.05+7481.104004*sin(2.047t); ODE45_main fil...

mer än 9 år ago | 0 answers | 0

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Question


Differential eguations： modify the program
Differential eguations dy1/dt=-a*y1+y2*y3 dy2/dt=-b(y2-y3) dy3/dt=-a*y2+ y3-3*y2*y3 a=4 b=8 c=30 y1(0)=0 y2(0...

mer än 9 år ago | 1 answer | 0

1

answer