1
vote
1answer
12 views

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? ...
5
votes
1answer
37 views

Export[] performance

Consider this sequence of commands: ...
1
vote
2answers
74 views

One to Many Lists Merge

I have two lists: ...
1
vote
4answers
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 ? ...
1
vote
2answers
83 views
2
votes
1answer
49 views

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. ...
1
vote
1answer
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? ...
0
votes
0answers
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 ...
1
vote
1answer
110 views

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 ...
7
votes
1answer
48 views

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 ...
1
vote
0answers
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. ...
3
votes
1answer
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 ...
2
votes
1answer
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 ...
10
votes
4answers
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. ...
1
vote
1answer
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 ...
19
votes
2answers
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, ...
1
vote
1answer
36 views
0
votes
1answer
26 views

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 ...
1
vote
1answer
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 ...
0
votes
0answers
34 views

Rearranging 5 equations

I am trying to rearrange 5 equations in terms of 5 variables. I have the equations for y1, y2, ...
2
votes
6answers
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 ...
3
votes
2answers
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 ...
1
vote
0answers
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 ...
2
votes
0answers
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. ...
5
votes
1answer
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? ...
0
votes
0answers
30 views

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?
6
votes
2answers
98 views

DeleteMissing level spec confusion

Given: titanic = ExampleData[{"Dataset", "Titanic"}] Why does this correctly delete Missing[] elements: ...
3
votes
1answer
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", ...
-3
votes
0answers
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 ...
3
votes
1answer
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 ...
8
votes
0answers
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 ...
15
votes
4answers
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. ...
9
votes
1answer
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 ...
1
vote
0answers
30 views

Use of Mathematica to put equation into vector form

Is there a way to put the following equation of a line into vector form using Mathematica (or a Mathematical package)? $\displaystyle ...
3
votes
1answer
92 views

Solution to a T+U = E equation

I needed to solve really easy differential equation (in dimensionless units): $$ \mathcal{T} (\dot{\xi}) + \mathcal{U} (\xi) = \text{const.} \equiv \varepsilon ; \quad T(\dot{\xi}) = \dot{\xi}^2 ; ...
0
votes
0answers
34 views

Plotting graphs with different values of parameters

I am having trouble in Plotting the graph of f'(t) which involves parameters K,Ha and s. I have to fix $Ha=.5$ and $s=-.5$ and give variation to Ha. I don't know what is the problem that mathematica ...
-2
votes
0answers
26 views

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?
1
vote
1answer
55 views

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 ...
4
votes
2answers
189 views

Short form of Graphics

Sometimes I want to investigate the structure of Graphics/Graphics3D which is produced by ...
3
votes
1answer
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: ...
5
votes
2answers
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 ...
0
votes
0answers
24 views

Empty Snapshots when uploading WDP Demonstration

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 ...
2
votes
1answer
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 ...
3
votes
2answers
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, ...
2
votes
1answer
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: ...
2
votes
2answers
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. ...
4
votes
2answers
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 ...
0
votes
1answer
57 views

How to sum 2 tables? [on hold]

this is what we've got: ...
31
votes
1answer
569 views

Incompatible Changes since Mathematica Version 7?

There is documentation of the incompatible changes made to Mathematica with each major release: Incompatible Changes since Mathematica Version 1 Unfortunately that documentation simply stopped ...
2
votes
2answers
67 views

Function WeatherData fails

If I use WeatherData[] only some of my requests work. For example if I use WeatherData[{"Chicago", 3}] I get the correct output: ...

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