Tagged Questions
0
votes
4answers
113 views
Specify a variable as an integer
I have a formula that always evaluates to a certain number for any variable X under one condition that X is an integer and ...
1
vote
2answers
130 views
Why does Evaluate[a[[1]]]=0 assign a value to a variable while a[[1]]=0 doesn't?
I'm trying to do a small page counter with Mathematica, for leting me know about my reading progress on some books. I'm stuck on a problem:
...
4
votes
0answers
80 views
Context “Unique to This Notebook” makes variables black even if they're not defined?
I'm trying to use this technique to keep variables separated between different notebooks. It seems to be working fine, except that variables turn black as soon as they are evaluated — any ideas why ...
10
votes
3answers
226 views
How can I hold UpValues but evaluate other expressions?
Consider these definitions:
own = "OwnValue";
down[_] = "DownValue";
sub[_][_] = "SubValue";
N[n] = 3.14;
_[___, up, ___] ^= "UpValue";
The attribute ...
2
votes
1answer
391 views
setting a variable equal to the output of FindRoot
So I set a function f[x]
f[x_] := x*E^(-x) - 0.16064
Then I set a variable 'actualroot' to the function FindRoot, starting at 3
...
12
votes
4answers
429 views
Making a symbol's new definitions be tried before all previously defined ones
Is there any way to "close" a package (or a symbol, or a context) in that if a user of the package adds definitions to the symbol they will be tried before the package defined ones, just like what ...
