# All Questions

18 views

### NIntegrate using Boole doesn't work

This doesn't want to work for me - I don't know why not. It usually gives me 0, but sometimes also a different number. I know it should be a small, non-zero number. ...
34 views

### millenium problem - Riemamm Zeta Funtion [on hold]

do you know Riemamm hipothesis of millenium problems that clay math institute proposed? that is a mistery about prime number pattern. as you know, prime number is natural number individed 1 and ...
56 views

### Solve returns a wrong answer

I'm afraid the following is rather localized questions, but I don't know how to simplify and generalize it. I have the following two points (in the real plane): ...
32 views

### Can one use Map during Expand?

Can one Map a simplifying function to the summands of an Expand before fully expanding the expression in question first? ...
46 views

### How can I type lim and sum?

this problem how can I type it? I type it as: Limit[Sum[Sqrt[1 + i^2/n^2]/n, {i, n}], n -> Infinity] but this is not working:
38 views

### I want to plot a line against an XY graph between to pairs of numbers [on hold]

I have two sets of points {{0, -2},{3, 0}} and I want a line traced between them on a standard chart with the $-y$ going down the $+y$ going up, the $-x$ on the ...
36 views

### Using NIntegrate with InterpolatingFunction

I am trying to find the time average value of a function I've found by using NDSolve, but it doesn't seem to work right since I get two different results when I use ...
49 views

### How to graph in Cylindrical coordinates in 3D

I need help figuring out how to plot in cylindrical coordinates. I read that CylindricalPlot3D was replaced with ...
18 views

### Unknown Gridbox error preventing graphics display in Mathematica

I have compiled the code for a simple interactive game. When I go to run the program, a nearly blank window comes up, and mousing over the window displays the message "A GridBox with an invalid ...
68 views

### Custom image as plot marker

Is there a quick and easy way with Graphics to replace the standard data points in a plot with a custom image?
37 views

### Arrowhead as MeshStyle or PlotMarkers for ListLinePlot

Is it possible to use the Meshstyle option of the PlotMarkers option in ListLinePlot to have ...
30 views

### Shortcut to insert plaintext?

Oftentimes I would find it useful to insert plaintext, to not be evaluated as input, right next to my input code. Is there a shortcut key to insert such a plaintext input box? I have relied on ...
36 views

### How to find coordinates of an abstract vector relative to a basis

Let's say I have a degree 3 homogeneous polynomial over variables $x0, x1, x2.$ There are then 10 distinct monic monomials, forming a basis of the vector space of polynomials of degree 3. If I have ...
25 views

### Getting the most out of FullSimplify[] [on hold]

First time poster, long time reader. My question concerns getting the most out of FullSimplify[]. Specifically I have this phrase ...
67 views

### How to type binomial coefficient $\binom{n}{k}$

I know how to type a fraction as you would write a fraction in Mathematica (9). How do you type Binomial[n,k] as $\binom{n}{k}$ in Mathematica? Is there a single ...
32 views

### Plot with sum and binomial commend

A few days ago I asked about a problem with plotting a sum. You advice me to use Evaluate option, and that helped me very. But now I have a very similar problem, but i can't find the mistake. I have a ...
41 views

### 2d expression evaluated in 1d plot [on hold]

So I have some f(x,y), I am trying to evaluate the expression (Im not declaring it as a function just using the f(x,y) as math notation) as y=0 and the x will varie as such: Plot[AlphaXParam, {x, ...
31 views

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### up arrow works in math version 9, fails in math version 8 ^[[A [duplicate]

I have strange up-arrow behavior on command line Mathematica 8 versus Mathematica 9. Version 9 gives me history, where version 8 fails with escape codes. Any way to make them both work on the same ...
226 views

### How to pick increasing numbers from the list

How to pick increasing numbers from the list. lst = {5, 3, 6, 2, 7, 4, 8}; out: {5,6,7,8} So many interesting ...
38 views

### Using FindFit for step functions

Having used FindFit like so: ...
26 views

I can load my library, but I cannot unload it with LibraryUnload. I do have a ...
49 views

### Partial result of aborted evaluation of FullSimplify[]

When FullSimplify invoked on a large expression, it can run for hours. If I do not have time to wait, and abort the evaluation, I get no result, although, ...
32 views

### Is it possible to enclose code into collapsible/expandable regions? [duplicate]

In some programming languages (e.g. C#, Visual Basic) there are language constructs that have no effect on the execution of code whatsoever, but exist solely to allow grouping fragments of code into ...
193 views

### Convert array from {{…}} to “[[…]]”

I have made this function: conv01 = Map["["<>StringJoin@@Riffle[#,","]<>"]"&,Map[ToString,#,{2}],{0,1}]& to convert: ...
16 views

I use IKernelLink class. When I call evaluate method, I get an exception, because I have unread data. How can I ignore it?
61 views

### What is the default ColorFunction for Image3D?

What is the default ColorFunction for Image3D? I find it a bit confusing that the most intense colour is not shown where the ...
12 views

### FormCalc Troubleshooting

I was wondering if someone knows enough about the FormCalc package to help me out: I am using FeynArts to generate Feynman-diagrams for certain tree-level processes in my own model and FormCalc to ...
38 views

### StreamPlot,smooth curves

Using the StreamPlot I observed that when the streamline is a small circle, this line is not smooth. How can I increase the number of points along the streamline? For example, these are the magnetic ...
61 views

### Will I be able to use NDSolve, and then how

So I am completely new to Mathematica, so sorry if this is a dumb question. I have a set of 3 coupled nonlinear differential equations. They are (a,b,c,D,L constants): ...
37 views

### Differentiating a function that has NIntegrate within it

I am something of a novice with Mathematica. I have written the following code; ...
64 views

### NSolve with numerical function

I would like to solve numerically an equation which involves a numerical function constructed by fitting some data: ...
184 views

### Make a differentiable smooth sawtooth waveform

So, I am trying to understand the effect of sawtooth waveform on a mechanical system model. For example, a system of a plate and a box on it. And then we try to oscillate the plate. In order to do ...
72 views

### ScheduledTask with scoped variables. Working with timed evaluation

I guess I have to try harder and focus more but timed evaluation always frustrates me. I will show the issue on simple example of delayed trigger. ...
67 views

### Gamma function computation efficiency?

I wonder what kind of algorithm is used to compute the values for the gamma function. Specifically, I am interested in how the computational load increases when the complexity of the input grows. So, ...
100 views

### Reproducing a Plot done with WolframAlpha [duplicate]

I have problem to draw in Mathematica a plot like this: Plot[{Sum[a^10*(-1)^(x-a), {a, 1, x}]}, {x, 1, 10}] The problem is that on the plot there is no graph. As ...
59 views

### How to make GraphicsGrid with different widths of rows?

I want to make GraphicsGrid and I want to use first row for indication of parameters, but in that case the first row remains in same size as others. How can I make ...
64 views

### Using high RasterSize or ImageResolution changes contour pattern

I found that the detailed contour pattern will be altered if we Rasterize the original graphics using high RasterSize or ...
92 views

### Combining 2 or more functions

Maybe the question is stupid but I am newbie in using Mathematica, so I really need your help. I have a periodic smooth function s[ϕ] and $4$ different functions ...