All Questions

139 views

Equivalent of __FILE__?

Many languages define a special identifier whose value is the path to the source file currently being processed. (For example, in C, this is done through the ...
126 views

Question with ParametricNDSolveValue

When solving the following system: ...
65 views

How to create a ListPlot containing two lists? [duplicate]

I'm trying to plot a set of points where one list corresponds to the X values another list corresponds to the Y values. I have ...
276 views

Building conditional lists with Manipulate

I'm trying to select elements of a list that satisfy some criteria using Manipulate[]. Given 2 lists: ...
121 views

Exporting a histogram to PDF in without rasterising it

How can I export a histogram without rasterising it? The labels and axes seem unaffected, but the bars themselves are pixelated when I zoom into them in a PDF viewer. For example, if I run ...
1k views

I'm at a point in my Mathematica journey where I need to be a little bit more strategic about my coding. Presently, I have a bunch of notebook files organized using the filesystem of the OS and ...
1k views

Having Problem with Importing Excel file to Mathematica Notebook?

I have solved some equations and exported the final results, which they are several Matrices, as a EXCEL file ( .Xls ). Now, I want to use these EXCEL files as my inputs to solve some other equations. ...
133 views

What should I call the messages that appear when the mouse moves over failed graphics output?

I attempted to evaluate the following Plot[x^2, {x, 1, 2}, PlotStyle -> {RGBColor[a]}] which, of course, failed. After the failure, putting my mouse over the ...
314 views

MathKernel doesn't return all Messages

In Mathematica I run this command: Plot[Sin[x], {x, 1, 15}, GridLines -> error] It generates a Plot with this error message: A GridLines specification ...
139 views

Replace content of selected cells, each getting different new content

Let's say I select 2 different cells and then attempt to replace their content using NotebookWrite inside a button. How might I replace each cell's content ...
150 views

Behaviour of Locator

I seek advice regarding the constrained behaviour of the Locator: appears confined to square {0,0}->{1,1}. When I change starting position it snaps to this constrained region. The code I am referring ...
119 views

Why do I get a different answer from the use of TrigExpand?

This is an old post but I get two different answers from Mathematica 9.0.1.0 ...
382 views

Projecting on an arbitrary plane

I have the following code, giving me a representation of a photon hitting a cylinder: ...
185 views

Renaming a list with name obtained interactively

I have a list say: m = {1, 2, 3} The list is inside a package, and is the result of a calculation. I want to give the user the option to rename it, for example ...
111 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: ...
169 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: ...
309 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 ...
307 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? ...
366 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 ...
377 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 ...
239 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. ...
156 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: ...
135 views

See this example : ...
77 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 ...
184 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 ...
421 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: ...
149 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 ...
154 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 ...
143 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 ...
310 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 ...
228 views

findroot, derivative in defined functions

I apologize for my unclear question, I will write it in a more detailed way. I first define: ...
272 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: ...
371 views

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

This is another question on the design choices in Mathematica. I understand that without direct reply from the developers it may not be possible to give a definitive and exhaustive answer to "why" ...
484 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 ...
387 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 ...
174 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 ...
727 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. ...
1k 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 ...
234 views

Overlapping pure functions

Let say I need and option for Plot: RegionFunction -> (-6 < #2 < 6 &) But I also want those ...
1k 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 ...
67 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 ...
255 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 ...
136 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 ...
235 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: ...
167 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 ...
572 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 ...