# All Questions

97 views

### Using Mathematica to find the areas described by polar curves

I am working on a project and I need to find the area of the surface inside the polar-curve $r=2\cos(\theta)$ and outside the polar-curve $r=1$. The graph is pretty straightforward: just two ...
94 views

### Move figure to origin [closed]

I have used PixelValuePositions to get coordinates from a figure. But I would like to move the figure, so the origin is in the middle of the figure. An example ...
60 views

### Why does documentation search fail on substrings?

For example many times I have to type the full string exactly which defeats the point of a search, so perhaps this is a bug?
34 views

### Save a Mathematica notebook evaluated [duplicate]

My notebooks can take some time to evaluate and by quitting Mathematica, I have to reevaluate every definition I've made once I restart Mathematica. Is there a way to tell Mathematica to save the ...
262 views

### Repeatedly applying a function

I have a list of numbers: allNums = {2, 5, 10, 17, 26, 1, 3, 7, 13, 21, 31, 1, 2, 11, 28, 53, 1, 6, 19, 40, 69} I calculate all possible pairs of two numbers ...
73 views

### InterpolationOrder has no effect on ListContourPlot when the data is of the form {x,y,f[x,y]}

This is related to the issue brought up here, if you want to mark it as duplicate feel free to do so, but it is slightly separate. Take two sets of data, identical except for the form, ...
120 views

### Manipulator reset bug

Bug introduced in 10.3 or earlier, fixed in 10.4. When the + opener is opened, two things happen: ...
102 views

...
93 views

### PametricPlot3D vs ContourPlot3D

Basically, I don't know whether I am missing something mathematically fundamental or I misued Mathematica's functions. ...
50 views

### Eliminate a variable from a differential equation and an algebra equation then collect the remaining variables

Recently, I am attempting to eliminate a variable from a differential equation (DE) and an algebra equation (AE), then collect the remaining variables as a new (grand) parameter. Actually, I have ...
119 views

### Plotting two variables indirectly dependent on each other

I have the following system of linear ODEs for "i" number of species "c" migrating in "j" number of habitats: ...
80 views

### How to increase the font size when printing?

Under print settings there are a number of options for print format (working, condensed, printout, printout grey, ...). It seems clear that the print settings are configurable, but perhaps that is ...
95 views

...
147 views

### How to set the bar exactly in the center of plot marker?

ErrorListPlot usually does not put the error bar exactly in the center of the plot markers. For example: ...
101 views

### Insert elements in several positions in a list [closed]

How to insert multiple elements in a list? list={1,2,3,4,5,6,7,8,9} Output: ...
132 views

### Making a Button smaller in width

I can't seem to figure out how to make the width of a Button smaller. I tried change the first 26 below to a number like 10. But it doesn't seem to effect the ...
109 views

### Wolfram Cloud Question - VectorPlot3D

I tried Mathematica in the Wolfram Cloud when it first came out. I found it riddled with glitches. I'm attempting to give a second shot now. I tried plotting the following code: ...
34 views

### Normal subgroups, Group order, Automorphisms

I am a beginner at Mathematica and have a few problems. Find all normal subgroups of the Alternating Group A[4]. Find the order of a group Aut(U[8]). Find the group Aut(S[3]). I've been trying to ...
44 views

### How to solve Quadratic Program in vector form?

I've gotten Q matrix and Y vector, Q matrix is a 7x7 matrix, but the "NMinimize" in wolfram seem can only solve the real number not vector, how to solve it in vector form? (alpha 7x1 vector, Y 7x1 ...
120 views

### BarChart with empty bars removed

Consider the following BarChart: ...
214 views

41 views

### Ordering of MeshCoordinates in MeshRegion and associated BoundaryMeshRegion

When generating a MeshRegion from a BoundaryMeshRegion and vice versa it would be advantageous if the two types of objects were ...
45 views

### Strange eigenvector behaviour for matrix with large numerical values

I'm trying to compute the eigenvectors of a matrix with large numerical values  \left( \begin{array}{ccccc} 0 & 1.\times 10^{18} & 100 \text{X} & 0 & 1.\times 10^{11} \text{X} \\ ...