# All Questions

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### What is going on here? (Wolfram|Alpha)

When I alter the input by removing a space next to the x, I get a completely different result on Wolfram|Alpha -- why is this? ...
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### Export[] performance

Consider this sequence of commands: ...
74 views

### One to Many Lists Merge

I have two lists: ...
295 views

### how to find the intersection points of two circles in 3D

I have two circles in 3d space generated from their parametric Equations. Also, these two circles are on the same plane. How can I find out their intersection points from the parametric Equation ? ...
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Situation: ...
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### Using HoldFirst but not wishing to hold everything

I have a DynamicModule in which I go through some data analysis and keep or reject the results. Here is a toy example of what I am doing. ...
32 views

### Why legendmarkers shifted a few pixels after opacity is specified

In below simple graph, if an opacity is specified in the legendmarkers, the plot marker shifted a little bit, can someone please shed some lights? ...
25 views

### How do I perform the following numerical integration

I have the following integral to evaluate numerically: $$x(t) = \frac{1}{f(t)}\int_0^{t_b} t^m (t + n)^o \sin(pt) \mathrm{d}t \quad m,n,o,p \in \mathbb{R}$$ $t_b, m, n, o,$ and $p$ are known ...
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### How to propel the integration of time a little bit further? Numerical solution can not evolve to the max time

I try to solve a nonlinear partial differential equation. I obtain a numerical solution which can not continue to the max time I set, I always receive message NDSolve::ndcf: Repeated convergence ...
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### Is other faster algorithm to judge that a matrix is upper-triangular-matrix?

Today, a problem occured to my mind that how to judge the upper-triangular-matrix. So I have a trial. Algorithm $a_{ij}=0$ Or $i \leq j$ $\Rightarrow$ $True$ So my functionality shown as ...
17 views

### Bug? Side effects when exporting to .mx

I seem to have encountered a bug when exporting to .mx, at least on OS X. Can anyone reproduce this? I am on MMA 10, OS X 10.9.4. ...
53 views

### How to create a table?

I have looked here at the forum and on the mathematica documentation center though still couldn't get it to work. I have two lists ...
42 views

### How to draw multi curves in a graph with errorbars

The curves are composed by several 2*n nested lists. I want these curves be placed in a 3d way, like the xy plane is for the data, different curves are located in several parallel xy planes with ...
313 views

### How to get Company Logo or Image

I can see that companies have a logo in Wolfram|Alpha when I type in their name but I can't get them in Mathematica. For example searching for Apple, Inc. in W|A one of the outputs is the Apple logo. ...
30 views

### How to draw the trajectory of a moving particle

I want to draw a 3D graph showing a nanoparticle movements in liquid environment. Basically,the code is like the followings. I used Table to generate the position coordinates instead of using the ...
2k views

### Streaming Data into Mathematica from a serial port

I'm attempting to see if I can capture an incoming stream of data being transmitted remotely from an arduino device into Mathematica. The plan is to connect some temperature probes to the Arduino, ...
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### Defining a function that takes a function as a parameter

I have a function like this CentralDifferentMethod[α_, β_, α1_, α2_, λ_, v0_, dt_, t_] Now, I want to add a new parameter ...
41 views

### How to solve this equation?

Mathematica does not give me the correct solution (-1) for this equation: Solve[9^(x + 4) == 27^(1 - x), x] Do I miss something or is Solve the wrong approach ...
34 views

### Rearranging 5 equations

I am trying to rearrange 5 equations in terms of 5 variables. I have the equations for y1, y2, ...
129 views

### Setting the elements of a list equal to elements of a different list

A = {a,b,c,d,e,f,g,h} B = {1,2,3,4,5} How would I go about setting some of the elements in list A equal to the elements in list B and then the left over elements ...
67 views

### approximation to prime counting function

Is there a function similar to PrimePi that gives approximate value for large numbers? In particular, I need a reasonably good approximation for $\pi(x)$, where ...
12 views

### Import file size capacity for Mathematica

I am trying to import a large data set (.csv) into Mathematica. The data set contains more than 14 million rows, is this something Mathematica can handle? If not, what is the maximum capacity? I have ...
41 views

### How could I visualize a rotating cone within a sphere?

I am just learning Mathematica and as the title states here is what I want to achieve. How do I visualize a rotating cone within a sphere ? The length of my cone is governed by following equation. ...
161 views

### Plotting a moving ball for projectile motion with animate

Here is my code for plotting an orbit. What I want to do is have the "planet" shown as it orbits in the simulation. Can anyone help with this? ...
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### Decompose the functions into partial fraction [on hold]

Decompose the functions into partial fractions f[x] = 2/x^2 - 2 x - 8 How to write partial fractions in Mathematica?
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### DeleteMissing level spec confusion

Given: titanic = ExampleData[{"Dataset", "Titanic"}] Why does this correctly delete Missing[] elements: ...
82 views

### Graph expansion on Mathematica

Is there a way by which Mathematica can be given a graph as an input and be asked to find its expansion? Note: By "expansion" I mean the quantity called "isoperimetric number" or "Cheeger constant", ...
22 views

### Trigonomery problem [on hold]

I got a trigo problem I need to solve asap :p I've got a triangle, with no right angle. 1 of the side length is know, and the opposite angle is known too. I am spliting the triangle with a line ...
76 views

### The front end encountered an error while processing a “NotebookPredictions” packet

I occasionally get the error The front end encountered an error while processing a "NotebookPredictions" packet. I cannot find any documentation for this error message online. It does not ...
29 views

### How can I restore the old ImageCompose behaviour?

Prior to version 10, if ImageCompose was used to overlay a partially transparent image region over a completely transparent image region, the result would keep the ...
903 views

### Plotting data points: Optimizing size and visuals

The following problem is one that may have showed up to you while plotting a large data collection. Suppose you have a data set of say 1 million points. ...
94 views

### Is there a comprehensive list of functions with V10 operator forms?

Version 10 sports operator forms for many functions like Map, SortBy, Select which allow you ...
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### Dividing radicals (roots) [on hold]

I have this expression: √3 / √75-√27 Now do I simplify √75 and √27 into smaller forms, or is it sufficient to subtract 27 from 75 and then simplify 48?
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### NSolve for complicated equation involving double cross product

I have the following issue. I am trying to solve a 3-vector equation for the vector slx, sly, and ...
189 views

### Short form of Graphics

Sometimes I want to investigate the structure of Graphics/Graphics3D which is produced by ...
49 views

### Issue with combining weighted data log histograms

I have a bit of a strange problem. I'd like to overlay 3 different logarithmic Histograms with two of them stacked and one separate [*]. Without weights the solution is simple: ...
168 views

### How to set PlotLegend Number Format

Is there any way to make Mathematica to show the legend labels like a real number rather than in fraction form? I read the BarLegend options, however they are just ...
24 views

I have a problem when uploading a demonstration for the WDP. Upload works fine, the demo does too but the snapshots do not behave. Particularly, the demonstration plots some curves generated by data ...
92 views

### Continuous 3D Arg Plot

I have a problem with jumping phase plots using the Arg function in mathematica. I have looked at the other questions already asked here (e.g., continuous phase/Arg ...
28 views

### Thick of a marker in ErrorListPlot

I have error bars that are too small, so the marker are too big, i want to shrink the dots. If i do ErrorListPlot[dato,PlotMarkers->{o,1}] my bars do not show, ...
46 views

### Compare some lists, if elements are almost equal

I've got the solutions of three systems on two variables (a and b) that gives results sometimes almost equal. The three list are not of equal length! For example: ...
51 views

### Some major and minor ticks are not shown in Plotting functions

I am using Mathematica 10.0.1 on Windows 64-bit machine. I have two 1D lists as follows. ...
104 views

### How to understand the process of ListCorrelate when it in two-dimensional condition?

Toady,I learn a function ListCorrelate,and I can understand process of execution his result in one-dimensional. However,the ...
57 views

### How to sum 2 tables? [on hold]

this is what we've got: ...