# All Questions

70 views

### Error control for NDSolve

I have a problem controlling the numerical error associated with the following non-linear ODE : ...
67 views

### Using Merge[Identity] and Transpose on a Dataset

While experimenting with this answer, I ran across the following: ...
34 views

### Adding a legend to ListContourPlot [duplicate]

I am struggling to add a legend to my plots. I am using ListContourPlot and my data is ASiAufrontZnO, which is an array of data with three columns ...
77 views

### Easy way to add another parameter to Manipulate

Vector definitions: I'm sorry that I didn't include the Vector definitions. I forgot because I had them in initialization cells. Here they are: ...
72 views

### Output code not highlighted when used as input

I have reported this issue: [CASE:3389542] Today, I accidentally found what I believe is an unwanted feature of the front-end, where input code is not appropriately highlighted and the dynamic ...
58 views

### ParametricPlot not plotting the results I'm getting from NDSolve

I try to plot a phase diagram with ParametricPlot but everytime Mathematica does nothing. I start by ; ...
44 views

### How to remove parts of an expression

I have an expression where terms Transpose[R].R appear. R is a matrix with the property Transpose[R].R=IdentityMatrix[3]. How ...
72 views

### Coloring network edges by weight using GraphPlot

Following up on a previous question about how to color the nodes (vertices) of a network (graph) according to a color scaling of a property of those nodes, I'm now asking basically the same thing ...
228 views

### Improving a selection routine

How can this code for extracting the smallest (absolute) real value be improved? and would it be simpler using associations? ...
84 views

### How to test if file exists on the front end machine?

When using a remote Mathematica kernel, how can you test if a file exists on the local front end machine? Of course FileExistsQ cannot be used in this scenario, ...
137 views

### Undocumented fourth parameter of Collect; how long has it been there?

While tinkering with How to get a list of monomials of a polynomial without coefficients? on a whim I tried a fourth argument in Collect and found: ...
98 views

### Distribute transpose on matrix multiplication

I need to do the following: Transpose[A.(B+C)]=Transpose[B].Transpose[A]+Transpose[C].Transpose[A] How should I do this in mathematica? So far mathematica does ...
54 views

73 views

### StreamPlot of potential flow from a finite element calculation

I am trying to calculate a potential flow past a thick plate. The finite element calculation seems to go well but I am finding it difficult to get a nice plot of the flow. The stages below are, ...
31 views

### Analytical Fourier Transforms with convolution rule [closed]

The task is the following, how to extend Mathematica's FourierTransform command in order to be able to analytically deal with non-linear differential equations. To do so it should be able to deal with ...
26 views

### How align Table column on decimal point yet use text styling?

Form a table such as: data = Transpose[{Range[0, 5], RandomReal[{-5, 5}, 6]}]; Display it by wrapping with TableForm. Is ...
59 views

### URLFetch Problem with the Size of HTTP Message Body

I am trying to transmit this string as an HTTP Message BODY ...
96 views

### Functions as objects [duplicate]

I have a very long program I'm trying to stuff express as a single function. (I'll include it at the bottom of my post.) My long-term goal is to trim out the file handling portion of this function, ...
66 views

### Delete Element within a List based on the Order [closed]

I want to do the following, deleting the element of a list that do not match an increasing order as example: {1,2,3,4,6,5,7,8}->{1,2,3,4,6,7,8} I've thought of using DeleteCases but I'm not able to ...
78 views

### Possible bug with Manipulate [duplicate]

Bug introduced in 10.1.0 and fixed in 10.2.0 I am observing a potential bug not present in MMA 10.0.1.0 on Win 7 Ultimate, but observable on MMA 10.1 on Win 7 Enterprise. It seems to work with ...
42 views

### DiscreteMarkovProcess: labelling of states

Related, but it seems like the respondents there misunderstood the question. The following errors as DiscreteMarkovProcess::invsm: ...
69 views

### How do I programatically set up an NDSolve with lots of equations?

I'd like to set up... NDSolve[x1'[t]==2,x1[0]==0, x2'[t]==2,x2[0]==0, x3'[t]==2,x3[0]==0, x4'[t]==2,x4[0]==0, x5'[t]==2,x5[0]==0, ... etc Can I somehow use ...