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2
votes
3answers
83 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
114 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
81 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 ...
7
votes
1answer
177 views

Plotting a region with polar axes

I want to plot the region of points who satisfy the following equation: 2 < r <= 5 && 3/4 π < θ <= 5/4 π I have been able to plot region in ...
4
votes
2answers
135 views

Adding a thick curve to a regionplot

Suppose we have the following simple RegionPlot: ...
5
votes
0answers
70 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
54 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 ...
6
votes
1answer
111 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
61 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 ...
1
vote
0answers
57 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
92 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
77 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
94 views

Revert y-axis in RegionPlot

I have the following code: ...
3
votes
1answer
121 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
223 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: ...
1
vote
1answer
79 views

RegionPlot of a Double integration [closed]

Hey guys I have a problem where I want to sketch the region of integration: Integrate[x Cos[y^2], {x, 0, 3}, {y, x^2, 9}] I know I have to use ...
3
votes
1answer
179 views

Put random points into a specific 2D subregion

I want to cover a particular subregion of the x-y plane with a random distribution. As this particular region is not a circle I encounter some problems declaring the permitted zone where to put ...
1
vote
1answer
103 views

How one can make the boundary of the regionplot smaller or bigger?

Suppose we have a regionplot as follows: ...
0
votes
0answers
48 views

RegionPlot giving an “invalid comparison” error

I am trying to use RegionPlot in Mathematica and I am stuck because I am getting an invalid comparison error. I am trying to evaluate the following code: ...
2
votes
1answer
176 views

Making a rectangular label for RegionPlot

I have a plot that includes a Region Plot. I want to make a rectangle with the same shading as in the region plot to show as a legend. The dumb way I can think off ...
2
votes
1answer
151 views

project from a n-dimensional space to 2-dim

let's say that I have a sphere in $N$-dimensions $$x_1^2+x_2^2+...+x_N^2=R$$ If I want to know the projection on the $x_1-x_2$ plane in this case I can figure out myself that is a circle, but how ...
0
votes
1answer
129 views

How to use ParametricPlot Wih Conditions (or similar)

I´m analizyng the game "Battle of the Buddies" similar to "Prisioner´s Dilenma" All works fine, BUT... I want to draw in red the point whose coordinates are less than the coords of a strategy. ...
2
votes
2answers
163 views

Plotting double inequality only for integer values

RegionPlot is plotting for all values. And using ListPlot I can only evaluate one inequality. How can I plot this type of ...
1
vote
1answer
121 views

How to force the RegionPlot to shade a narrow region?

I have an interactive demonstration, which (very simplified to leave out unnecessary details) looks as follows: ...