[Date Index]
[Thread Index]
[Author Index]
# Re: problem with Coefficient
vonessen@selway.umt.edu wrote:
>
> The Mathematica function Coefficient seemingly does not always work as
> it should:
>
> In[1]:=Coefficient[x^2 y^2,x^2 y^2]
> Out[1]=1
> In[2]:=Coefficient[x1^2 x2^2,x1^2 x2^2] Out[2]=0
>
> The first computation is correct, the second not. I made this
> computation on several computers using Mathematica 3.0 under Windows
> 95.
No help, but some other input to the discussion:
returns
Coefficient[x^2 y^2,x^2 y^2] 1 Coefficient[x1^2 y1^2,x1^2
y1^2] 1 Coefficient[x1^2 y2^2,x1^2 y2^2] 1 Coefficient[x1^2
x2^2,x1^2 x2^2] 0 Coefficient[(x1)^2 (x2)^2,Evaluate[(x1)^2
(x2)^2]] 0 Coefficient[x2^2 x3^2,x2^2 x3^2] 0 Coefficient[fred2^2
fred3^2,fred2^2 fred3^2] 0 Coefficient[polly2^2 fred3^2,polly2^2
fred3^2] 0 Coefficient[p^2 f^2,p^2 f^2] 1
Coefficient[Evaluate[x1^2 x2^2/.{x1->x,x2->y}],
Evaluate[x1^2 x2^2/.{x1->x,x2->y}]] 1
It seems like it cannot correctly handle similar symbols or long symbol
names and works best with single letters and no numbers. This is a
strange limitation. I wonder if this would pass technical supports
definition of a bug? If it is not a bug, but a "feature", I would be
very interested to know the explanation.
Prev by Date:
**Re: Mathematica 3.0.1 / Win95 woes**
Next by Date:
**Re: 2D Heat Equation w/ NDSolve**
Prev by thread:
**problem with Coefficient**
Next by thread:
**ListPlot + Colors**
| |