1 vote
196 views

### Why Mathematica does strange thing with complex numbers [duplicate]

For example, compare the two commands below. ...
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 ...
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 ...
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}] ...
436 views

### Finding the zeros of a non linear complex function

I need to find the roots of a nonlinear function, namely: ...
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 ...
456 views

### ContourPlot, problem with mesh

I have to plot this trigonometric function: ...
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] ...
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 ...
292 views

Consider: ...
2k views

### What is my problem with MeshFunction?

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

### Problem with ContourPlot

I tried these ...
1 vote
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
173 views

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

When I try this ...
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 \$\...