Questions on correct (or improved) formulation of Mathematica code to achieve particular results. Use this tag (not "symbol") for questions about all those odd @@ /@ # & and ~ characters.
2
votes
0answers
86 views
Syntax colouring when using Symbolize
I need to use symbols with suffixes in order to make my code readable in relation to the Eurocodes. To do this I use Symbolize from the ...
1
vote
1answer
48 views
Remove failed Solve[] attempts
I can't figure how to replace a failed evaluation with a null value.
I am very new to Mathematica.
I have an equation that are being processed using the Solve[] ...
3
votes
1answer
68 views
Force ellipsis to print an end of an expression
For pedantic reasons I want to display an infinite sum of fractions in fractional form (i.e. as 1/x not as x^(-1)) with an ellipsis at the end of the expression. I have tried a number of ways and ...
1
vote
1answer
83 views
Working of Date[]
Date[] returns the current date of local system, Date[1] returns {2012, 11, 15, 17, 41, 0.3161629}, ...
2
votes
1answer
134 views
Difference between Map[f[#] + g[#] &, {a, b, c}] and Map[f[x]+g[x]&, {a, b, c}]
Map[f[#] + g[#] &, {a, b, c}] vs Map[f[x]+g[x]&, {a, b, c}]
My question is: why is the output different?
...
11
votes
3answers
130 views
Why can't I use Sequence to perform a Select like task?
Suppose I wanted to write down a list of $p^2$, for $p$ a prime between $1$ and $20$. I would expect
Table[If[PrimeQ[k], k^2, Sequence[]], {k, 1, 20}]
to work. ...
6
votes
1answer
91 views
Problem overloading D[] using UpValues
First I define an entry of UpValues overloading D[] for expressions with head ftest:
...
0
votes
1answer
97 views
4
votes
1answer
54 views
Setting a binary operator Flat
I defined a binary operator in as the first statement in a new Mathematica notebook.
{x1_, y1_} ⊕ {x2_, y2_} := Module[{}, Print["do anything"];]
where the code ...
2
votes
2answers
146 views
local variable naming & symbolic argument
I'm stuck here with my variable assignment in this scenario
...
2
votes
2answers
138 views
Superscript prime symbol
x\[Prime] looks like $x_'$, ugly right?
Is there a way to make a symbol with prime to look like $x'$?
That's what I'm trying right now:
...
6
votes
2answers
106 views
how to read in a file in the same directory?
Now I am writing a small package. I have written several files and put them in the same directory. And some files need to read in or include another file in the same directory. But when I simply write ...
1
vote
2answers
177 views
How to insert an expression in a Mathematica program?
I need to insert a very large expression in a Mathematica program. So I first
Put[large expression,"file"]
and then use
Block[{}, Get["file"];...]
to ...
2
votes
2answers
285 views
Several functions in one RegionPlot with different grayscale
I try to plot the following, but something seems to be wrong in my code and I can't figure out how to fix it:
...
0
votes
0answers
106 views
Derivatives in scripts [closed]
I have consistently been harrowed by this tiny issue.
When I Try to run my Mathematica script, I get this error message:
...
