Hi,
I am trying to construct the usual spline basis functions. In short, I
start with several piecewise functions that take values 1 and 0 only,
and then make combinations of them. But there is something with the
syntax that I am not managing to do well, I suppose:
L[1]
Piecewise defined function with 3 parts, [[(-1, 0), 0], [(0,
1.50000000000000), 0], [(1.50000000000000, 3.20000000000000), 1]]
t = var('t')
L[1]*t
Traceback (click to the left for traceback)
...
AttributeError: 'sage.symbolic.expression.Expression' object has no
attribute 'domain'
It seems to me that I have to set things up so that L[1] is a function
of t as well. I tried "lambda t: " in front where I define it, but now
L[1] is a function whose value is always a certain piecewise
function :)
Any suggestions?
Thanks,
David
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