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4
votes
1answer
49 views
7
votes
3answers
178 views

How to combine ParametricPlot and RegionPlot?

I have two implicitly defined equations. I plot the implicit curve using parametric plot. ...
2
votes
2answers
61 views

How to make such a $N(0,1)$ sketch for standard normal Z?

My attempt: Plot[PDF[NormalDistribution[], x], {x, -4, 4} , AxesLabel -> {None, "Z"}]
0
votes
2answers
65 views

Returning value if a point is in a region?

I'm writing a function so that if the user clicks on a certain region, a value is returned. The function takes in a condition list like the one below and a point. ...
0
votes
0answers
25 views

Region Plot - Non Intersecting Regions

Is there anyway to plot non intersecting regions with RegionPlot? I was thinking someting in the spirit of: ...
2
votes
1answer
80 views

Stability Boundaries via Routh-Hurwitz Criterion

I'm attempting to determine the stability boundaries of a 2nd order system via Routh-Hurwitz stability criterion. That is to say, I need to compute when a polynomial, which is in terms of variables ...
11
votes
0answers
150 views

RegionPlot returning a number

Introduced in 10.0, persists in 10.1. I had updated my mathematica to version 10 few days ago. And I had been shocked by the following fact: ...
0
votes
0answers
36 views

Different Order of Magnitude on Distinct Interval Plot Axes

I have a function as bellow y[x_] := 9*10^-9*(Exp[x/(2*23*10^-3)] - 1) I am trying to plot this function for the range ...
2
votes
2answers
109 views
0
votes
1answer
49 views

Using custom ticks with RegionPlot3D

I'm trying to change to plot a sphere using RegionPlot3D and look at how the shape of the sphere changes when you use a logarithmic scale (or any nonlinear scale) ...
2
votes
1answer
92 views

RegionPlot3D does not plot “thin” regions?

Basically, I ultimately want to make something like this: However, I am unsure of how to do this in Mathematica. I'm trying to do this via RegionPlot3D, and for ...
0
votes
1answer
56 views

Complex number plot with inequalities [duplicate]

I need to plot the function where z is a complex number: $$S = {z:|z + 0.15|<0.6} \wedge {z:Pi/4<=arg(z)<=Pi}$$ I can do this: ...
0
votes
1answer
59 views

Region projection of multivariable interpolated function

I have a problem plotting a multivariable interpolated function when projected into two-dimensions using Resolve and RegionPlot. ...
0
votes
1answer
51 views

why RegionPlot has cut in ring when changing plot range?

I am not sure I understand this one, thought to check with the experts. Please compare ...
6
votes
1answer
91 views

TransformedRegion, RegionPlot broken in 10.0.2.0?

After having had trouble applying TranslationTransform to a simple region like so ...
2
votes
2answers
212 views

How to show surfaces as a implicit plot in 3d?

I was trying to show a feasible region with these lines: ...
0
votes
1answer
88 views

Superpose a map and a region plot

I would like to add on a map of city a region plot, which is this one in this case : ...
2
votes
1answer
63 views

How to make RegionPlot3D automatically choose PlotRange?

I'm looking at the winning one-liners of 2014, this one inparticular: ...
10
votes
1answer
177 views

Rapid density estimation and rendering of decision regions

I would like to create an interactive demonstration using Manipulate[] that illustrates a fundamental concept in pattern classification and machine learning. This ...
4
votes
2answers
194 views

How to plot this region?

Consider the $2\times 2$ matrices \begin{align} A=\begin{bmatrix} a_{11} & a_{12} \\ a_{21} & a_{22} \end{bmatrix} \end{align} and \begin{align} B=\begin{bmatrix} b_{11} & b_{12} \\ ...
0
votes
1answer
120 views

RegionPlot of an area inside a polar plot (or its equivalent parametric plot)

Let' s take a most simple example for a polar plot, the Archimede's spiral. ...
2
votes
0answers
39 views

Error message with RegionPlot after SetOptions

I get an error message with SetOptions[RegionPlot, ImageSize -> Medium]; RegionPlot[u v (1 - v) >= 10, {v, 0, 1}, {u, 0, 100}] that says ...
6
votes
2answers
194 views

RegionPlot from NDSolve

I am having quite a headache using RegionPlot to see the region of acceptance of certain coupled differential equation. I shall elaborate and try to be as ...
5
votes
3answers
142 views

Find Unconnected Subregions

If I have a region, how can I identify sub regions that may be disconnected, if any exist? region defines a rectangular region given two diagonally opposed ...
0
votes
1answer
128 views

Why this region is bad?

I want to draw a region but the result of Mathematica is not good. Why? ...
3
votes
1answer
92 views

RegionPlot fails when given function with internally redefined variables

I've just upgraded to v10, and have noticed that some of my trusty old notebooks which used RegionPlot now fail to run. I've boiled down the problem I'm having to ...
3
votes
1answer
91 views

RegionPlot with ColorFunction gives ugly frame labels

I was working on a simple 2D region plot: ...
2
votes
3answers
157 views

How to embed a filled Region in a Graphics?

Let for example: regn = RegionDifference[Rectangle[{-2, -2}, {2, 2}], Disk[{0, 0}, 1]]; The only documented way I found to draw a gereric region ...
3
votes
3answers
175 views

How to shade a plotted region in specific direction?

I am using RegionPlot to plot a linear program maximize 30x1+25x2 with the constraints ...
3
votes
2answers
96 views

RegionFunction generalized to plot a different colour/style for the largest expression [duplicate]

I have several functions of two variables defined in some region, say functions[x_,y_]:={0,x-y,Sin[x^2-y]} I'd like a plot to show at a glance the regions where ...
6
votes
3answers
297 views

How can i construct a 3D surface pass through a curve defined by formula and some other controllable points?

For example, If a have a curve defined by x^2+y^2=1 and z=0, and some isolated points having z coordinates, Can I construct a 3D surface passed through? It's better if I can change the surface shape ...
2
votes
2answers
202 views

Using RegionPlot3D to make a cone under restrictions

I have to plot a cone that satisfies this statement: Use the RegionPlot3D command to draw a picture of a cone with its point at the origin. The other end of the cone is a circle with radius 5 ...
5
votes
3answers
293 views

Aligning the axeslabel in a 3D list plot ($x,y,z$) (edited)?

I have the following code ...
2
votes
3answers
130 views

RegionPlot won't finish, but Plot3D does

I would like to produce a region plot where some function is less than 1. This runs for hours without finishing (until I lose patience and abort it). However, I can plot the function (using ...
1
vote
1answer
78 views

Strange functioning of RegionPlot with Reduce's output

I have defined this two quantities: f = (-b + Sqrt[b^2 + 4 a])/(2 a) g = (-b - Sqrt[b^2 + 4 a])/(2 a) and I want to solve this system in function of $a$, for ...
1
vote
0answers
107 views

Stability region of midpoint method using Solve and RegionPlot

I've been trying to obtain the stability region in the $(\lambda_R, i\lambda_I)$ plane of the midpoint rule $$y_{n+1}= y_{n-1}+2h\dot{y}_n,$$ for the model problem $\dot{y}=\lambda y$. The roots for ...
2
votes
3answers
177 views

Solve equations within range and plot [duplicate]

Hi I have these pair of equations to solve: $$ 1 - 3 x y = 5 z - 2 x $$ $$ y = 7 x z - \frac{z}{x} $$ I want to eliminate $z$ and plot $y(x)$ within the range $-2 < x < 2$ and $-2 < y ...
1
vote
1answer
152 views

3D Contour Plot - parts with gradients less and more than zero

I'm trying to plot sections of the 3D Contours, with gradient less than zero, and more than zero and equal to zero. It manages to solve for the derivative, but when I apply the conditions ...
2
votes
1answer
110 views

Plotting a region with thin cusps in high-definition via RegionPlot

I want a high-definition picture the real solutions $(s_1,s_2,s_3)$ of the system of inequalities $3 s_1^2 < (s_2 - s_3)^2 + 2 s_1(s_2 + s_3)\\ 3 s_2^2 < (s_1 - s_3)^2 + 2 s_2(s_1 + s_3)\\ 3 ...
4
votes
2answers
212 views

Adding a thick curve to a regionplot

Suppose we have the following simple RegionPlot: ...
5
votes
0answers
95 views

Plotting a transformed region only works with integer inputs

I can't figure out why the following code only works with integers. ...
1
vote
1answer
88 views

How to make a region plot indicating the largest among a set of functions [duplicate]

I want to make a RegionPlot (or possibly a ContourPlot) in $x$-$y$ space that indicates which among a set of functions is the ...
7
votes
1answer
191 views

Can't plot rotated region

I was experimenting with the code from this question when I ran into another problem with regions. ...
1
vote
1answer
82 views

Why does one Monitor expression work while another fails?

I have a (somewhat involved) function f[x?NumericQ, y?NumericQ] and for some reason it behaves differently when given a Table ...
2
votes
0answers
159 views

Smooth out contour in RegionPlot/ContourPlot

I would like to smooth out the jagged edges in the outermost contours in the following plot: I have data of values as a function of variables (x,y) in the form ...
3
votes
1answer
152 views

RegionPlot3D and Texture

I'm getting a white solid instead of a solid with texture, I'm not sure what is wrong: ...
0
votes
1answer
103 views

RegionPlot not working as expected

I was trying to evaluate the following expression: RegionPlot[a > 0 && 2 a + b == 0, {a, -2, 2}, {b, -1.5, 1}, PlotLegends -> "Expressions"] ...
1
vote
1answer
118 views

Revert y-axis in RegionPlot

I have the following code: ...
3
votes
1answer
198 views

Little triangles appearing in a Mathematica region plot with “opacity” saved in a PDF file [duplicate]

I am trying to produce a region plot of many functions, but Mathematica keeps showing me the little triangles when I save it as pdf. I have seen other solutions which fix the problem with PlotStyle-> ...
2
votes
2answers
304 views

region plot in a 2-simplex

I want to plot a 2-dimensional region with constraint $x+y\le N$, i.e., I want to plot a sub-region inside a 2-simplex. As an example: ...