The sympy.solvers.solveset.linear_eq_to_matrix is probably what you are
needing:
```python
>>> eqns = [c*x + z - 1 - c, y + z, x - y]
>>> A, b = linear_eq_to_matrix(eqns, [x, y, z])
>>> A
Matrix([
[c, 0, 1],
[0, 1, 1],
[1, -1, 0]])
>>> b
Matrix([
[c + 1],
[ 0],
[ 0]])
```
On Tuesday, May 11, 2021 at 12:54:49 PM UTC-5 [email protected] wrote:
> Got adain interested in a book LINEAR ALGEBRA with APLICATIONS, very nice
> book, very early there are exercises to show the corresponding matrix of
> coeffients. Trivial, if one types by reading the ckeeficients to bild the
> riws Matrix needs. But now my question : How to generate thebmatrix by a
> def ....
> ok lhs and rhs of an Eq is easy, using args too . But what dimyoundo if
> there are equations with differen numbers of say x_i. Missing unknows have
> to create an 0 at the needed row.index.
> I translated an equation (lhs) with srepr with regular expression ,
> replacing Symbol ('x1) to 1 etc .
>
> Questions , how would you trans form e.g x1 + x3 - 2*x5 To
> 1 0 1 0 -2 ?
>
> Ok, I extract x1 x3 and x5 ==>!knowing now x2 and x4 is missing, knowing
> the 0 at index 1 and 3 (zero order of Python) ...
>
> Have to learn to give code examples here ... Pictutes ?
> Newbie in this groep
>
> Ideas and help very much apteciated 😉 , by the way i am an 祖父 is grandpa
>
>
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