New answers tagged replacement
4
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why replacement does not work with centerdot
The key difference is that MemberQ[Attributes[NonCommutativeMultiply], Flat] == True while Attributes[CenterDot]=={}.
You can ...
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0
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why replacement does not work with centerdot
When you type
a\[CenterDot]ad\[CenterDot]ad
the expression has a full form of
...
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0
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2
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3
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3
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Make a new list of rules by matching up keys from two given lists of rules
Two other ways to do this are
Thread[Values[list1] -> Values[list2]]
or
...
- 131
3
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4
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3
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Trying to substitute an element of a given type by an integer
a = {{0}, {0, 0, 0}, {0, 0, 0, 16, 12}, {13, 7, 11}, {14}};
b = {0, 2, 0, 2, 2, 2, 0, 0, -1, 2, 2, 2, 2, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0};
An alternative using <...
- 31.1k
5
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5
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Trying to substitute an element of a given type by an integer
Here are a couple of alternatives:
Do the replacement as part of the mapped function:
Map[b[[#]] /. List -> 0 &, a, {-1}]
Change the head of the expression ...
- 33.9k
1
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Trying to substitute an element of a given type by an integer
Extract[b, List /@ a, Replace[#, List -> 0, {1}] &]
(* {{0}, {0, 0, 0}, {0, 0, 0, 0, 2}, {2, 0, 2}, {0}} *)
Or
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4
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Accepted
4
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Accepted
The arrow inside string
Look at the reference page for \[RightArrow] to see how you can enter it.
Either type in \[RightArrow], or use the alias ...
- 33.4k
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