Linked Questions
21 questions linked to/from Why do I have to put Evaluate[] here
3
votes
3
answers
376
views
Plotting function lists [duplicate]
Possible Duplicate:
Difference in Plot when using Evaluate vs when not using Evaluate
Why do I have to put Evaluate[] here
Why is ContourPlot not displaying this curve?
Why is nothing (empty ...
- 1,587
1
vote
1
answer
311
views
ContourPlot not evaluating correctly [duplicate]
When I try to plot an evaluated equation with contour plot in Mathematica 9, but do so with a variable, the plot is empty, but when I input the evaluated equation itself, the ContourPlot plots ...
- 11
3
votes
0
answers
99
views
How to convert a list of polynomials into a list of equations and plug into Contourplot? [duplicate]
Given a list q of polynomials (output of GroebnerBasis) in two variables I want to transform the list into a list of equations and plug it into CountourPlot. For ...
- 41
1
vote
0
answers
49
views
Plotting equations stored in a variable [duplicate]
The following produces an empty plot:
eqn = x^2 + y^2 == 1;
ContourPlot[eqn, {x, -1, 1}, {y, -1, 1}]
Whereas the following plots a circle, as expected:
...
- 4,751
0
votes
0
answers
41
views
Some confusions about Evaluate[] and HoldAll in Plot[] [duplicate]
i can't understand the outputs of the three commands in the following picture.
question1:
In my understanding, command one Plot[Table[a*x^2,{a,3}],{x,-3,3}] is ...
- 353
20
votes
4
answers
9k
views
How can I mark each of several plots with a parameter that identifies it?
I've got a two variable function that I'm plotting against one axis for a few different values of a parameter
...
- 6,458
15
votes
4
answers
4k
views
Why is ContourPlot not displaying this curve?
I am using the general form of a second-degree plane curve:
$$Ax^2+2Bxy + Cy^2+2Dx + 2Ey + F = 0$$
I want to randomly generate plane curves of this form, so I am using ...
- 2,154
13
votes
2
answers
2k
views
Displaying a series obtained by evaluating a Taylor series
Description of problem
I would like to use Mathematica to display the series obtained by substituting a value for $x$ in a Taylor series expansion. The terms of the series will be rational numbers, ...
- 2,197
6
votes
6
answers
334
views
Cases with Alternatives failed
Consider this list of rules
rules = {a -> 1, b -> 2, c -> 3}
I'd like to fish some of the rules out of such a list using ...
- 8,723
6
votes
2
answers
684
views
Manipulating slots in a pure function
How does one manipulate the slot numbers in a pure function? Some trick with Evaluate or Hold? I'm aiming for something along ...
- 8,480
0
votes
2
answers
4k
views
Why won't this graph? [closed]
I'm trying to sketch level curve for z=k for the specified values of k={-2,-1,2}
of z= 4x^2 - 4x + y^2 + 2y
So I changed this(...
- 15
3
votes
3
answers
469
views
How to plot multiple functions from a list
I'd like to get separate plots for the functions in a list, and I'm trying the following, which doesn't work. What is the correct way to do that?
...
- 387
5
votes
1
answer
261
views
Why is Evaluate[] in Plot[] not necessary in some cases?
after reading some related materials(Why do I have to put Evaluate[] here), in my understanding, BecauseAttributes[Plot] has ...
- 353
0
votes
1
answer
838
views
Why won't ContourPlot accept a variable argument? [duplicate]
I have a list of linear inequalities which describe a (polygonal) region. I can use RegionPlot to visualize this region; but I'd also like to overlay this plot with ...
0
votes
1
answer
306
views
Why does initialization slow down manipulate in this case?
I'm trying to manipulate a plot of function with some parameters. The function is a long expression, so I tried to put it inside the Initialization options of ...
- 27.7k