Linked Questions

1 vote
1 answer
196 views

Why Mathematica does strange thing with complex numbers [duplicate]

For example, compare the two commands below. ...
3 votes
1 answer
124 views

Plotting in for loop

I am having some problem while plotting the data being generated in for loop My aim is to plot the result of for loop while it is solving the equation for each value of w,i.e. plot between w and x ...
4 votes
2 answers
85 views

Placing a contour line at y when f(x)>=y

I have an issue that the plot below drops the contour at 0. I suspect this case is special because my function is lower bounded by 0. As a work-around, I changed 0 to 0.01, but it looks jagged, any ...
0 votes
0 answers
59 views

Bug in Contour Plot [duplicate]

I think the following are bugs: ContourPlot[y (x - 1)^2 == 0, {x, 0, 2}, {y, -2, 10}] ...
2 votes
1 answer
436 views

Finding the zeros of a non linear complex function

I need to find the roots of a nonlinear function, namely: ...
2 votes
2 answers
311 views

How to plot this equation for $x,y$?

(1 + r^2 + x)^2 - (-1 + r)^2 ((1 + x)^2 + y^2)=0 2 (2 r^3 + (1 + x)^2 + y^2 - r (-1 + x^2 + y^2))=0 I am trying to plot $x$ and $y$ which are giving by the ...
2 votes
1 answer
456 views

ContourPlot, problem with mesh

I have to plot this trigonometric function: ...
4 votes
2 answers
405 views

A particular contour does not show up, even though it is in my list [duplicate]

Consider: f = Sqrt[9 - x^2 - y^2]; ContourPlot[f, {x, -4, 4}, {y, -4, 4}, Contours -> {0, 1, 2, 3}, ContourLabels -> All, ContourShading -> None] ...
41 votes
2 answers
3k views

Specific initial sample points for 3D plots

PlotPoints lets you determine how many sample points you want in each direction, but sometimes I want specific ones. For Plot ...
4 votes
1 answer
292 views

One Mesh Line does not show up in ContourPlot

Consider: ...
14 votes
5 answers
2k views

What is my problem with MeshFunction?

I want plot the max value in a sine plot. We can use the following code ...
12 votes
4 answers
8k views

Problem with ContourPlot

I tried these ...
1 vote
2 answers
606 views

How can I get an approximate contour plot from a 3D plot?

I have some larger square, Hermitian matrices, M, (dimension 20, say, much more than 4) with 2 independent variables, call them x and y. I can plot the eigenvalues as functions of x and y with: <...
1 vote
0 answers
173 views

ContourPlot of implicit function doesn't work when I square the equation [duplicate]

When I try this ...
4 votes
1 answer
471 views

How to plot the contour of the radius part of a complex function

Suppose we have a complex function $f(x,y)$, in which x and y are real variables. In theory we can write the function into the polar form $$ f(x,y)=r(x,y)e^{i\theta(xy)} $$ where $r(x,y)$ and $\...

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