# All Questions

115 views

### NotebookWrite Multiple Selected Objects

Lets say I select shapes in a Graphics diagram in the following picture. Generated from the following set of code: ...
179 views

### Isolate a specific contour without Contour Shading

I have a contour plot that took a few hours to evaluate. Is there a way that I can show only the contour lines of a specific value without re-evaluating the contour plot?
110 views

### Plotting a function dependent on $x/d$

I have a problem in plotting a function. The example code is as following: ...
326 views

### Clever use of DownValues, or failure to understand the “Mathematica Way.”

I needed to look at the changes in the values of about 4000 items from one year to the next. I have a table with identifiers and values for each year. Not all of the items are in each list. The ...
343 views

### Solve equation containing conditions (If expressions)

I want to solve the underneath equation. If I try Solve[AAA,dc], then I get no solution. Can anybody explain this? ...
474 views

### Using Greek letters with subscripts as symbols

I'd like to use Subscript[ϕ, 1] as a function name: Subscript[ϕ, 1][x_] = C1 + C2*x + C3*Exp[α*x] + C4*Exp[-α*x] But as I use ...
581 views

### Using subscript in a string

I am trying to create a string of the form $0 < d_1 < d_2 < \ldots < d_n$ For a given n. My closest attempt so far is ...
242 views

### $1 - \sqrt{5}$ $\in$ $\mathbf{R}$?

Why is there a difference in the output of the following codes? First: ...
1k views

### Problem with plotting legends using the PlotLegends package

Here is my problem : I have a table composed of 3 "under"-Lists and I'd like to plot it with legends, but I can't find a way to do it. ...
165 views

### plot probability

Hi I just want to flatten a function, I tied it with Joined->True, but it did not work, hope somebody of you can help me. This is my code: ...
137 views

See this example : ...
92 views

### Aborting a computation correctly in .NETLink to allow future computations

Has anyone had any success using the AbortEvaluation() function in IKernelLink to stop a computation and then do more ...
201 views

### find derivative with defined function

s[a_, b_] := NDSolve[{y''[x] == y[x] Cos[x + y[x]], y[0] == a, y'[0] == 1}, y, {x,0, b}] I need to find the minimal of $\int _1^by[x]^2$ in the region ...
548 views

### How to define a function based on the output of DSolve? [duplicate]

I would like to define a function based on the output of the following DSolve call: ...
176 views

### Short circuit logical operators [duplicate]

Suppose I want to compute $f(1)\vee f(2) \vee \ldots \vee f(10^{10})$, but I know a priori that $f(n)$ is True for some $n \ll 10^{10}$ with high probability. For ...
166 views

### Specifying optional arguments with variables

Perhaps this is poor programming on my part, but I would like to create a function that uses a variable as an optional parameter: var = 2; f[a_:var] := {a} The ...
150 views

### Lists not being recognized correctly within manipulate

I've created a keyboard-free panning system within Mathematica. The code does the job, but I continually get errors in relation to it, and I cannot seem to get it to perform within a CDF because of ...
377 views

### Altering layout and sizing of Manipulate controls?

I'm currently working on a display project using Manipulate and was wondering if there is a straightforward way to alter the placement of the control options that I ...
265 views

### findroot, derivative in defined functions

I apologize for my unclear question, I will write it in a more detailed way. I first define: ...
325 views

### Intersection & Complement operations for lists of Morphological Components?

I have an array of $M$ sets of morphological components corresponding to the same image, however computed in different ways. For example, we might have: ...
470 views

### Why does list assignment with a packed array result in unpacked values?

Bug introduced in 5.2 or earlier and fixed in 10.1.0 This is another question on the design choices in Mathematica. I understand that without direct reply from the developers it may not be ...
530 views

### Opacity and overlapping multiple polygons

Let's say I have 100 polygons that are all different but most of them overlap. All I want to do is to draw/plot them in one single graphic with linearly adding gray values; i.e., a point with ...
510 views

### Looking for equivalent of MinorTicks->None

I am looking for the most general possible way to suppress the display of minor ticks in Mathematica plots.1 More specifically, I'm looking for the equivalent (or near-equivalent) of a fictional ...
205 views

### Averaging multiple 2D data sets

I have multiple data sets, each of which is a 2D matrix. I want to construct a new 2D Matrix in which each element is the average of that element for all the original data sets. i.e ...
872 views

### How can I run .exe file in Mathematica

we have a .exe file. It takes input as .txt file and gives output as another .txt file. ...
2k views

### Finding intersection of two graphs

Here is a toy problem: I have a (directional) line that starts from {2,0} and goes through {1.8, 0.01}. Also I have a ...
241 views

### Overlapping pure functions

Let say I need and option for Plot: RegionFunction -> (-6 < #2 < 6 &) But I also want those ...
2k views

### Possible to export Excel formulas?

I would like to export an .XLS file complete with data and formulas. Is this possible using Export? For example, here is data and a formula :- I can import ...
69 views

### Can I evaluated a cell in a notebook in a background process?

I currently run my Mathematica on a linux computer through Putty and Xming. Xming provides a graphical display for Mathematica windows running on a remote linux computer. But recently, the network ...
344 views

### Split dataset based on the first column [duplicate]

I have a dataset which I want to split based on the first column. The data looks like this ...
142 views

### Plotting boundary value expression against a parameter

I am very new to Mathematica and have a question regarding plotting a ODE boundary value problem. Let say I have an ODE ...
290 views

### TransformedDistribution doesn't work

I'm trying to obtain a sum distribution of two discrete random variables. The function TransformedDistribution doesn't work for me in such case: ...
182 views

### Extracting values

I have imported a data from an excel sheet. I want to extract parts of the list based on some conditions. First I want to create one list whit the The Coca-Cola ...
848 views

### How to set the ratio between the vertical and horizontal scales of plots?

The documentation says that when AspectRatio->Automatic is specified, Mathematica determines the ratio of height to width from the actual coordinate values ...
110 views

### CCodeGenerate and calling external functions

Is it possible to use CCodeGenerate to generate code which calls functions from other C libraries? For example, I would like to do something like this: ...
435 views

### Matching parentheses size in plot labels

I am attempting to do a seemingly-simple task: label ordered pairs in a Plot that display with parentheses that grow to match the expression within. I've trawled ...
115 views

### Automatically generated summation region

In a multiple Sum I need to put an automatically generated summation region. But when I generate the summation region automatically I get a list whose elements are ...
121 views

### How to make endpoints flush with fill in ListLinePlot?

If one plots a filled line plot such as, for example, the one produced by ...
406 views

### integrating a Green's function for a damped harmonic oscillator

I have the following integrand: int = Sin[Sqrt[-g^2 + omega^2]*(t - tp)]*Exp[-g*(t - tp)]*A*Exp[-(tp - t0)^2/sigma^2]*Cos[Omega*tp]/Sqrt[-g^2 + omega^2] and am ...
712 views

### Numeric calculation of Hessian

I want to calculate the Hessian matrix for a function that can only be evaluated numerically. So far, I have the following (where f is just for testing): ...
53 views

### Fastest way to add a constant column into a array [duplicate]

What is the fastest way to add a constant (1 in this test) into a array? There is my attempt: ...
98 views

### Slow CreateDialog when passing image sequence

I'm attempting to display an image sequence of 40 images inside of a Manipulate that cycles through each frame with a slider. I would like the ...
108 views

### Is there such a command like FindZero[f[x],{x,1}]?

I´d like to find the zeros of a function. I know I could find them by Solve[f[x] == 0, x] but that gives me only the x-coordinates. I want to get both the ...
319 views

I have a curiosity as regards the infinite product below. I wonder why Mathematica v.8.0. says the limit is $1$. This is not true. ...
215 views

### How to transform a DumpSaved .mx file to .m file conveniently?

I have many DumpSave-d .mx files under a directory. They are generated under Linux. The .mx ...
130 views

### How can I export definitions of several symbols to a single file?

the problem related to this question What I want to do is to Export definition of several symbol into a single file. The reason I choose ...
838 views

### How can I plot a hyperbola from its complex representation?

How can I plot the hyperbola represented by the following complex equation: $$\left|z-a\right|-\left|z-b\right|=2t\tag{1}$$ Should I convert (1) into the following form? ...
2k views

### How to fix vertical axis scaling across multiple plots?

I have a collection of plots, all of which have the same horizontal-axis range, but different vertical-axis ranges. These ranges differ not only in the absolute locations of their maxima (...