2h
comment Dot when used in a pattern becomes Times... Why?
A single space will also work: Hold[a_ .b_] // FullForm. @Murta Optional is quite useful. A few examples from my own answers: (17498), (20715), (29366), (30591), (30919), (47844), (51670).
3h
revised Assigning to the "local" version of a symbol
edited tags
3h
answered Assigning to the "local" version of a symbol
10h
comment Can I regroup terms into a sum?
@Edmund for additional partition flexibility see: (7511)
10h
comment Nested list of patterns in SyntaxInformation "ArgumentsPattern"
+1 for an interesting alternative
17h
comment A possible bug with regard to DateObjects in Version 10?
Your code appears to work correctly here. Perhaps some resource (packlet) didn't load properly?
1d
comment How to evaluate a "pure function"?
Arguably a duplicate of: (60172)
1d
revised Returning the 3-dimensional vector from a skew symmetric matrix
added 60 characters in body
1d
answered Nested list of patterns in SyntaxInformation "ArgumentsPattern"
1d
comment Display problem multiplying matrix
The problem is MatrixForm. See, detail is important. :-) I am closing this question as a duplicate. (A link will be inserted at the top of your post.) See the answers there fore a full explanation.
1d
comment Display problem multiplying matrix
You need to include more detail of what you are doing. Possibly using Dot (short form .) will solve your problem if you have actual matrix data. The data might potentially need to be transposed. Also you can/should not use N as a variable as it is already a defined System function.
1d
revised Display problem multiplying matrix
added 3 characters in body
1d
comment Can't figure out how to apply these functions repeatedly
Related: (21281)
1d
comment How to evaluate a "pure function"?
Any of the methods from (6669) may be used to extract the Function; then it is simply a matter of applying it as you would any other function in Mathematica, e.g. func[arg]. See Function for reference.
1d
comment How can we plot the complex roots of an equation?
I would love to see complete code to generate the first image in your post. Is it possible for you to share this?
2d
comment Trying to write out the prime factorization of a number with CenterDot and Superscript
You may be interested in the Performance section that I just appended to my answer.
2d
revised Trying to write out the prime factorization of a number with CenterDot and Superscript
added 1006 characters in body
2d
comment Trying to write out the prime factorization of a number with CenterDot and Superscript
Thanks for the Accept. :-)
2d
revised Exclude Infinite Value in Table
added 203 characters in body
2d
comment Can I regroup terms into a sum?
Based on the answers received I don't think I understood the question. However none of the answers actually return an expression involving Sum which is what I thought wanted. Could you clarify your intent? Would you give a short example of the specific input and the output that would like the hypothetical function to produce?
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