# Search Results

Results tagged with Search options user 69
7 results

Questions about how Mathematica evaluates expressions, tracing evaluation (Trace*), handling expressions in unevaluated form (Hold*, Unevaluated), nonstandard evaluation, etc.

It's slightly simpler if you're willing to use b[1] instead of b1: Do[b[i] = Plot[i x, {x, 1, 10}],{i, 10}] b[3] If you're really keen on using b1, you can do something like: Do[ Set[Evaluat …
answered Jul 3 '12 by Brett Champion
Suppose you're evaluating something slightly different: Table[Pause[0.1](*SuperSlowExpression*), {i, 1000}] You can create a cell containing i, and use Evaluation > Evaluate in Subsession to see … the current value of i without interrupting the main evaluation. In the case where you don't have an iterator variable to inspect, then the question is whether there is some state or property in your SuperSlowExpression that could be evaluated to get an idea of how much progress has been made. …
answered Feb 8 '12 by Brett Champion
You're running into two issues. We'll start with the one that is causing the messages. By default Plot avoids symbolic evaluation of your function, and uses numeric evaluation instead. For example …
answered Apr 19 '14 by Brett Champion
Map is evaluating its arguments, so you end up with ValueQ[0] (False) instead of ValueQ[q]] (True); In[3]:= Map[ValueQ, Unevaluated[{q, x}]] Out[3]= {True, False}
answered Dec 23 '16 by Brett Champion
If you look in the Option Inspector, there's a setting called EvaluationCompletionAction that I keep set to "ShowTiming" The result of this is that whenever an evaluation finishes, the amount of …
answered Feb 14 '12 by Brett Champion
Evaluate needs to be the top-most expression inside Plot. As in, the code needs to look exactly like: Plot[Evaluate[...], ...] or else the call to Evaluate will be effectively ignored.
answered Jul 21 '13 by Brett Champion