# All Questions

186 views

### Using earlier version of mathematica [duplicate]

I have installed Mathematica v.9 previously, but I am tempted to use of Mathematica V.10, for this aim, before acting to Install newer version, do I have to uninstall V.9 completely. Or not (an option ...
107 views

### Simplify a huge expression with limited memory

I would like to perform some analytical sums such as the following ...
120 views

### Function for the Second Derivative Test

I wrote the following function. It is based on Mathematica for Rogawski's Calculus, 2nd Ed, 2007, Based on Mathematica 7. See: http://users.rowan.edu/~hassen/Math_Rogawski_Calc.htm, Chapter 14. I made ...
190 views

### Suddenly mathematica is very slow when screen is calibrated on windows

I installed V 10.0.2 64-bit when it was released. Since then it worked, except for the bugs. I used it earlier today, no problems. However this evening, opening Mathematica lasted a very long time of ...
106 views

### How to change the x-axis ticks from numbers to months

I have a ListLinePlot, for which the x-axis is time (November 2011 to January 2014). Now, when I plot it, the x-axis ticks run from 1 to 28 because the time ...
130 views

### How can I protect my notebook file with a password to open and save changes?

I want to protect my .nb file with a password, because now I'm using a free access computer in my university. Everybody student in my university can use that computer and I do not want my .nb file can ...
51 views

### How to simplify a quotient with exponents (using power rules)

I'm trying to simplify the following expression (b (1 - x)^n (-1 + x)^-n (-1 + x - w x)^n)/(n (-1 + w) (1 - x + w x)). All parameters and the variable x should ...
260 views

### How to change the font size of a pie chart's legend

I have a pie chart and I would like to make the font size of the legend bigger. I was able to make the fonts bigger for the chart labels but ...
101 views

### Interdependent Setter controls in Manipulate?

Documentation here shows a nice example of interdependent Slider controls in Manipulate: ...
110 views

### How can I force the use of sparse diagonalization methods?

When I evaluate the Eigenvalues function on a very large (e.g. 2^16 x 2^16) sparse matrix, Mathematica says something like: Because finding 65536 out of the ...
69 views

### Transforming a trigonometric expression into exponential notation

I have a table as ...
29 views

### Constructing new output object graphics [duplicate]

Occasionally, when you ask Mathematica to carry out a task for which there is no good compact representation for the output, it will generate a special icon in v10, or an abbreviation in lower ...
50 views

### Generic approaches for multivariable polynomials across different domains [closed]

Mathematica newbie here. So I don't have a lot of time to read through the whole library of functions and language rules. So I'm trying to settle in on generic ways of doing the math that I'm going to ...
85 views

### Min function for functions f1, f2, [closed]

There are several "min" functions in Mathematica. In the "Numerical" category, there is a "Min" function that works on a numerical list. Then there's MinValue for finding the minimum of a whole ...
77 views

### How to set default PageWidth for InputForm?

We can control the page width used by InputForm by applying SetOptions to "stdout": ...
91 views

### How to Copy formatted code without backslashes added?

By default code copied from the FrontEnd is formatted with backslashes added at the ends of lines. For example, evaluating in a Notebook Range[40] and copying ...
274 views

### Can I solve a certain equation?

Neither Mathematica nor Wolfram|Alpha can resolve the following. How else can I reach a solution? Reduce[(1 + x)^(2/m) - (1 - x)^(2/m) == (1 - x^2)^(1/m), x]
126 views

### How to use Compile to generate an $n\times n$ array using $n$ vectors

Let's consider the following: ...
50 views

### Changing the precision of data in a list of matrices

I have a list of matrices ...
131 views

### Weird behaviour of multiple transparent Raster3D objects in one Graphics3D

Consider this code ...
122 views

### Vector tips seem to resize and get ugly in some situations

In Selwyn Hollis's CalcLabs with Mathematica, Multivariable Calculus, 5th ed., he does some nice initialization code for adding vectors to a plot: ...
126 views

### Unexpected Weierstrass $\wp$-Function Behavior

In Mathematica, the Weierstrass $\wp$-function is expressed by WeierstrassP[u + I v, {g₂, g₃}] where g₂ and ...
109 views

### Problem with Clear[assoc] as a value in an Association

Bug introduced in 10.1 or earlier and fixed in 10.3 According to the documentation, in order to make sure that a value in an association is not evaluated at initialization, one can use a ...
626 views

### What is behind Mathematica's experimental FindFormula function?

In version 10.2 there is a new experimental function: FindFormula. I suspect that a genetic programming algorithm (symbolic regression) is behind this new feature ...
70 views

### How can I prove the following equality [closed]

I have the following equality : $$\int_0^\pi \frac{\cos(2t)}{a^2\sin^2(t)+b^2\cos^2(t)}dt=\frac{a}{a+b}-\frac{1}{2}$$ where $0 <b \leq a$. I used the residues but I could not prove this equality
126 views

### Odd StringTake problem in Dataset

10.2 Win64 Works fine... Dataset[{<|"a"->"ABC"|>}][All, StringTake[#a,{1,3}]&] Explicitly taking the whole string using its length directly. ...
86 views

### Analytic differential of an inverse transcendental function

I have the following function: $$y(x)=\frac{Ax}{Bx^{1/4}\sinh{(\frac{Bx^{1/4}}{2})}}\left(\cosh{(\frac{Bx^{1/4}}{2})}-1 \right),$$ where $A=112.941$ and $B=18.6588$. I want to find the differential ...
1k views

### How do I remove grid from this photo?

I found this cat a month ago, and I'm not his owners' friend so the mosquito grid was the inevitable problem. I would like to post-process this photo to get rid of it, but I don't know exactly how ...
43 views

### PlanetData “VelocityAroundSun” giving inconsistent answers

My goal is to create a ListPlot showing the Earth's orbital speed over the course of a year, with one datapoint per day. I'm seeing problems long before I even get to the point of plotting the data! ...
59 views

### Non-numeric elements in banded sparse array

The documentation mentions that "the elements in SparseArray need not be numeric", although "the individual elements of a sparse array cannot themselves be lists." ...
82 views

### TimelinePlot with Interval in Associations

Bug introduced in 10.2 This is related to a previous question I asked about TimelinePlot and multiple associations (Behavior of TimelinePlot with multiple ...
87 views

### Loss of chart when exporting data in DynamicModule

Bug fixed in V 10.2 In DynamicModule, the result is to show a panel with a flowchart and a Piechart. But when I export the ...
202 views

### What will happen if I set ExclusionsStyle for points in 2D plot?

For example f[x_] := (x^5 - 4 x^2 + 1)/(x - 1/2); Plot[f[x], {x, -1, 2}, Exclusions -> {f[x] == 0}, ExclusionsStyle -> Dashed] Has the ...
181 views

### How to obtain the area enclosed by such a curve?

The desired curve is defined as curve02 below : ...
85 views

### Does Mathematica have a plug-in for communicating with an Android device?

I am trying to take input from an Android device, do some processing in Mathematica and pass the final output back to the device, so I need a plug in to communicate to an Android device.
64 views

### smoothing plot edges

I have a data list as mydata: ...
441 views

### List manipulation challenge

It's necessary to get from list = {{a1, b1, c1}, {a2, b2, c2}, {a3, b3, c3},{a4, b4, c4}, {a5, b5, c5}}; I'd like to do this with ...
71 views

### How to parse fraction to a number?

Considering a fraction: val = "F \!$$\*FractionBox[\(1$$, $$1$$]\)"; I extract the part of interest: ...
87 views

### Is there a way to create a table where the number of dimensions is parameterized?

I'm imagining the likes of this: ...
38 views

### Dot production associated with comparison process of different matrices eigenvectors

With thanks to Guess who in the link module using.. We created functional 5*5 matrices: ...
58 views

### Module using for creating a table [closed]

I want to have a 4 tables with using of module. Unfortunately I don't know why doesn't it work ...
89 views

### Transposition of state space form of a transfer function

How can I transpose the output of state space model in Mathematica? trying the following code would transpose the top right symbol s instead of the matrices. ...
99 views

### Matrixform ndsolve for mobile robot dynamic equations

Error is: NDSolve::ndsdtc: The time constraint of 1.` seconds was exceeded trying to solve for derivatives, so the system will be treated as a system of differential-algebraic equations. You ...
79 views

### Factor a specific sub-polynomial?

Consider the following example for a polynomial in several variables: ...
153 views

### Multivariable Calculus Chain Rule

I am getting ready to write a notebook for the chain rule in Multivariable Calculus for my students. I do know: ...
131 views

### Passing an unevaluated part of an association to a function

I'm making a UI widget that controls sound volume on a speaker using a slider, e.g.: ...
39 views

### How to perform operations with vertices from any edge on a Graph object

I'm trying to get the vertices from an large list of edges on a Graph object in Mathematica 10. I need to operate them, adding, substracting dividing. As an ...
154 views

### Why do I need to apply DiscretizeRegion to a derived region to visualize it?

What are the design principles, or other explanations, as to why one needs to apply DiscretizeRegion to obtain a graphical representation of a derived region, ...