Dear support, this code is from interact help:
sage: @interact
... def _(A=matrix(QQ,3,3,range(9)), v=matrix(QQ,3,1,range(3))):
... try:
... x = A\v
... html('$$%s %s = %s$$'%(latex(A), latex(x), latex(v)))
... except:
... html('There is no solution to $$%s x=%s$$'%(latex(A),
latex(v)))
If I want to change five numbers in the matrix A, I get a solution
whenever I change each field.
Is it possible to change all my five fields first and the let interact
to compute the answer? In other words, interact should not do
anything, unless asked explicitly.
I was thinking about adding a checkbox and perform the computation
only if the checkbox is on, but this gives another problem: how to
uncheck the checkbox from Sage interact after computation is done.
I am thinking about an interact which allows some comfortable
manipulations with matrix rows and can be used for row pivoting,
evaluating inverse functions, solving systems of linear equations and
evaluating rank and determinants. For example, can be used on
recitations. If something like this has been done, let me know,
please. Many thanks
Robert Marik
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