Re: 回复: [sage-support] Re: 3D plot in sage

Thank you! - 原文 - 发件人: Jaap Spies 主　题: Re: 回复: [sage-support] Re: 3D plot in sage时　间: 2010年3月16日 05:43:18wxu...@sohu.com wrote:gt; Thank you very much!gt;gt; I will try this.gt;You could try the experimental version found here:http://sage.math.washington.edu/home/jsp/SPKGS/ETS/Jaap--

Re: 回复: [sage-support] Re: 3D plot in sage

Hi Jason and everyone,Thank you very much for your reply.Now I have a function or a set of data depending all the three coordinates x, y, z.In other words, there is a corresponding value at every point in 3 dimensional space, which maybevaries from -1 to 1. I want use color to represent the

Re: 回复: [sage-support] Re: 3D plot in sage

Thank you very much! I will try this.regards,YC - 原文 - 发件人: Jason Grout 主　题: Re: 回复: [sage-support] Re: 3D plot in sage时　间: 2010年3月16日 03:36:36On 03/16/2010 02:24 AM, wxu...@sohu.com wrote:gt; Hi Jason and everyone,gt; gt; Thank you very much for your reply.gt; gt; Now I have a

[sage-support] help with chanin dirivatives

Hi everyone,I have a function f=f(eta, bx, bt), in which diff(eta,x)=k(bx,bt) and diff(eta,t)=-omega(bx,bt) withbx=delta*x and bt=delta^2*t. I want to calculate the second order derivative diff(diff(f,x)). Theresult should be

Re: 回复: [sage-support] Re: 3D plot in sage

Actually I do need them to be plotted by color.it seems that sage is not designed for this way.could anyone give some information aboutwhat open source software can do this?Thanks a lot!YC - 原文 - 发件人: Jason Grout 主　题: Re: 回复: [sage-support] Re: 3D plot in sage时　间: 2010年3月12日 01:26:30On

回复: [sage-support] Re: 3D plot in sage

I don't want to plot f(x,y,z)=0.Yes, it should a 4d plot as you said.can that be done in sage?Thanks!YC - 原文 - 发件人: John H Palmieri 主　题: [sage-support] Re: 3D plot in sage时　间: 2010年3月10日 07:04:29On Mar 10, 9:39nbsp;am, wxu...@sohu.com wrote:gt; Hi everyone,I want do this thing as

[sage-support] 3D plot in sage

Hi everyone,I want do this thing as follows in sage, is that OK?var('x,y,z')f=cos(x)*cos(y)+cos(y)*cos(z)+cos(z)*cos(x)and then I want to plot f. how can do it in sage?Thanks in advance!regards,YC -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this

[sage-support] for help with partial differencial equations

Hi everyone,I want to use sage to solve the partial differentialnbsp; equations analytically.can anyone help to point out where I can find the documents about that?Thank you very much!YC -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send

[sage-support] about diff

Hi everyone, I have a question for help. I define phi1=function('phi1',x,y,t) phi2=function('phi2',x,y,t) phi3=function('phi3',x,y,t) psi=function('psi',x,y,t) x0=function('x0',x,y,t) y0=function('y0',x,y,t) theta=function('theta',x,y,t) phi1=cos(theta)*(x-x0)+sin(theta)*(y-y0)

[sage-support] help about the function diff()

Hi, all I just saw that if I defined a function: f=f(e^t), the f.diff(f,t) will give e^t*D[0](f)(e^t). and the question is what is the meaning of D[0](f)(e^t)? I can find that in the help of diff(). thanks in advance. --~--~-~--~~~---~--~~ To post to this

[sage-support] why this is wrong

Hi, all I typed the followings, var('f,A,p,m') f=A*p*(1+p)^m/[(1+p)^m-1] but it produced a error as follows, TypeError: unsupported operand parent(s) for '/': 'Symbolic Ring' and 'type 'list'' I am not clear about that. what is wrong? Thanks in advance!

[sage-support] Re: why this is wrong

I am so sorry. I just typed the bracket wrong. how can I delete the email? wxu...@sohu.com 写道: Hi, all I typed the followings, var('f,A,p,m') f=A*p*(1+p)^m/[(1+p)^m-1] but it produced a error as follows, TypeError: unsupported operand parent(s) for '/': 'Symbolic Ring' and 'type

[sage-support] How to change the config of sage

Hi all, when I use sage.4.0.2 to plot a picture, it use the eog to show it in default. But the eog can't save a gif file. so I want to know how to change the default config of sage to show something like a picture or a dvi file, etc. Thanks in advance!

[sage-support] [sage-support]how to collect the same items

Hi, I have another question. I have got the expression, a^2*x^4+b*x^4+c*x+d*y*x^4...(many items) I want to get the coefficient of all the x,x^2,x^3,x^4 here for x^4 is (a^2+b+d*y...) how can I get it? Thanks in advance! YC Xu --~--~-~--~~~---~--~~ To

[sage-support] Re: [sage-support]how to simply the equation

Thank you very much. Mike Hansen 写道: Hello, 2009/10/12 wxu...@sohu.com: Hi, everyone, I got the expression, sin(t)^8 + 4*sin(t)^6*cos(t)^2 + 6*sin(t)^4*cos(t)^4 + 4*sin(t)^2*cos(t)^6 + cos(t)^8 actually it is 1. how can I get it? Here you go: sage: t = var('t') sage: a

[sage-support] Re: [sage-support]how to collect the same items

The same expression, How can I want to get the coefficient of x^4*y? Thank you! Mike Hansen 写道: Hello, 2009/10/12 wxu...@sohu.com: Hi, I have another question. I have got the expression, a^2*x^4+b*x^4+c*x+d*y*x^4...(many items) I want to get the coefficient of all the

[sage-support] a question about the plotting in sage

I have some data from finite element calculating. I record the value of a variable at every node of each element. and I had plotted in matlab using the fellowing sentences: fill(X,Y,Stress_z); here the X and Y are the arrays of the x and y coordinates. and the Stress_z is the value of the

[sage-support] Re: a question about the plotting in sage

As you said, I read the help about the list_plot3d. It seems to be but not exactly what I want. I want the value of the variable to be draw by different colors, which the list_plot3d can't do. So can you give another favor? Thanks! On 7月3日, 下午6时26分, David Joyner wdjoy...@gmail.com wrote: