# Revision history [back]

### how to plot solution of differential system

Hi, everyone! I got a question. I have a system of three Newton's equations x''=-x/(xx+yy+zz)-F(t) y''=-x/(xx+yy+zz) z''=-x/(xx+yy+z*z)

I use odesolve() to solve numerically the system by using y for x, y for y, y for z like in example in the manual without using jacobian: j_1= lambda t,y: [ y, y, y, -y/(yy+yy+yy)^(1.5)-Fcos(wt), -y/(yy+yy+yy)^(1.5), -y/(yy+yy+y*y)^(1.5)]

How may I plot the curve (x(t), y(t)) or (x(t), z(t))? T.plot_solution(i=0, filename=outfile) allows to plot only x(t), y(t) or z(t) Thank you

### how to plot solution of differential system

Hi, everyone! I got a question. I have a system of three Newton's equations x''=-x/(xx+yy+zz)-F(t) z)^3/2-F(t) y''=-x/(xx+yy+zz) z)^3/2 z''=-x/(xx+yy+z*z)y+z*z)^3/2

I use odesolve() to solve numerically the system by using y for x, y for y, y for z like in example in the manual without using jacobian: j_1= lambda t,y: [ y, y, y, -y/(yy+yy+yy)^(1.5)-Fcos(wt), -y/(yy+yy+yy)^(1.5), -y/(yy+yy+y*y)^(1.5)]

How may I plot the curve (x(t), y(t)) or (x(t), z(t))? T.plot_solution(i=0, filename=outfile) allows to plot only x(t), y(t) or z(t) Thank you

### how to plot solution of differential system

Hi, everyone! I got a question. I have a system of three Newton's equations x''=-x/(xx+yy+zz)^3/2-F(t) y''=-x/(xx+yy+zz)^3/2 z''=-x/(xx+yy+z*z)^3/2

I use odesolve() to solve numerically the system by using y for x, y for y, y for z like in example in the manual without using jacobian: j_1= lambda t,y: [ y, y, y, -y/(yy+yy+yy)^(1.5)-Fcos(wt), -y/(yy+yy+yy)^(1.5), -y/(yy+yy+y*y)^(1.5)]

How may I plot the curve (x(t), y(t)) or (x(t), z(t))? T.plot_solution(i=0, filename=outfile) allows to plot only x(t), y(t) (x(t), t), (y(t), t) or z(t) (z(t), t) Thank you 4 No.4 Revision

### how to plot solution of differential system

Hi, everyone! I got a question. I have a system of three Newton's equations x''=-x/(xx+yy+zz)^3/2-F(t) y''=-x/(xx+yy+zz)^3/2 z''=-x/(xx+yy+z*z)^3/2equations

x''=-x/(x*x+y*y+z*z)^3/2-F(t)
y''=-x/(x*x+y*y+z*z)^3/2
z''=-x/(x*x+y*y+z*z)^3/2


I use odesolve() odesolve() to solve numerically the system by using y y for x, y y for y, y y for z like in example in the manual without using jacobian: jacobian:

j_1= lambda t,y: [ y, y, y,  -y/(yy+yy+yy)^(1.5)-Fcos(wt), -y/(yy+yy+yy)^(1.5), -y/(yy+yy+y*y)^(1.5)]-y/(y*y+y*y+y*y)^(1.5)-F*cos(w*t), -y/(y*y+y*y+y*y)^(1.5), -y/(y*y+y*y+y*y)^(1.5)]


How may I plot the curve (x(t), y(t)) or (x(t), z(t))? T.plot_solution(i=0, filename=outfile) filename=outfile) allows to plot only (x(t), t), (y(t), t) or (z(t), t) Thank you 5 No.5 Revision

### how to plot solution of differential system

Hi, everyone! I got a question. I have a system of three Newton's equations

x''=-x/(x*x+y*y+z*z)^3/2-F(t)
y''=-x/(x*x+y*y+z*z)^3/2
z''=-x/(x*x+y*y+z*z)^3/2


I use odesolve()ode_solver() to solve numerically the system by using y for x, y for y, y for z like in example in the manual without using jacobian:

j_1= lambda t,y: [ y, y, y,  -y/(y*y+y*y+y*y)^(1.5)-F*cos(w*t), -y/(y*y+y*y+y*y)^(1.5), -y/(y*y+y*y+y*y)^(1.5)]


How may I plot the curve (x(t), y(t)) or (x(t), z(t))? T.plot_solution(i=0, filename=outfile) allows to plot only (x(t), t), (y(t), t) or (z(t), t) Thank you