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Question about concatenation “a||b” in Maple?
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Rex
Feb 8, 2012, 5:54:57 AM2/8/12
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I test the code
L=[2,1];
sum('a||b*L[1]', 'b' = 1 .. 2);
It returns `a1*L[1]+a2*L[1]`, but I expect to get `a1*2+a2*2` after
evaluation of `L[1]`.
Any ideas?
L=[2,1];
sum('a||b*L[1]', 'b' = 1 .. 2);
It returns `a1*L[1]+a2*L[1]`, but I expect to get `a1*2+a2*2` after
evaluation of `L[1]`.
Any ideas?
Rex
Feb 8, 2012, 5:53:51 AM2/8/12
to
A. van der Meer
Feb 8, 2012, 10:22:50 AM2/8/12
to
(2) add(a||b*L[1], b = 1 .. 2);
Adri
Rex
Feb 8, 2012, 1:57:16 PM2/8/12
to
Great thanks Adri. Sorry for my typo for "L:=".
I have one further question. Here's the test code:
L := [2, 1]
test := proc (i) local a1; a1 := 1; add(a || b*L[i], b = 1 ..
2) end proc
test(1);
will result
2 a1 + 2 a2
without evaluating `a1` which is a local variable defined in function
test.
I expect to get `2*1+2*a2`.
On Feb 8, 7:22 am, "A. van der Meer"
I have one further question. Here's the test code:
L := [2, 1]
test := proc (i) local a1; a1 := 1; add(a || b*L[i], b = 1 ..
2) end proc
test(1);
will result
2 a1 + 2 a2
without evaluating `a1` which is a local variable defined in function
test.
I expect to get `2*1+2*a2`.
On Feb 8, 7:22 am, "A. van der Meer"
Joe Riel
Feb 8, 2012, 3:52:26 PM2/8/12
to
Rex <aoi...@gmail.com> writes:
> Great thanks Adri. Sorry for my typo for "L:=".
>
> I have one further question. Here's the test code:
>
> L := [2, 1]
> test := proc (i) local a1; a1 := 1; add(a || b*L[i], b = 1 ..
> 2) end proc
> test(1);
> will result
> 2 a1 + 2 a2
> without evaluating `a1` which is a local variable defined in function
> test.
> I expect to get `2*1+2*a2`.
The catenation operator generates global variables, not locals.
> Great thanks Adri. Sorry for my typo for "L:=".
>
> I have one further question. Here's the test code:
>
> L := [2, 1]
> test := proc (i) local a1; a1 := 1; add(a || b*L[i], b = 1 ..
> 2) end proc
> test(1);
> will result
> 2 a1 + 2 a2
> without evaluating `a1` which is a local variable defined in function
> test.
> I expect to get `2*1+2*a2`.
Using indexing if you want to refer to a local by an index.
--
Joe Riel
Rex
Feb 8, 2012, 5:34:34 PM2/8/12
to
Got it. Thank you very much, Joe.
Have a nice day.
Have a nice day.
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