# All Questions

63 views

### InputField AutoSize Speed Issue

How do I have an InputField adjust to fill the remaining size of the window automatically? For example: Using the ImageSize ...
185 views

### Error in ARIMAProcess example

I am trying to compile the sample of ARIMAProcess of MMA here .It doesn't work.What is wrong?Could you please help?I am using exact same code. ...
517 views

### Image Processing: Concrete test blocks

Background Concrete is mixture of aggregates and cement. Aggregates are composed of different sizes and colors. Core samples are taken by drilling in order to test the strength of concrete . They are ...
264 views

### balanced Shortest[] and string-patterns

The pattern Shortest["A"~~__~~"B"] is oriented : It assumes the text is read from left to right and it takes the text between the first "A" and the next "B". Any ...
199 views

### Module Returns Two Values for Plot; I need to Color them

This is probably a very stupid question, but I've been fighting with it for quite awhile now. So suppose you have a module: ...
336 views

### How does the built-in debugger decide what to highlight?

How does the built-in debugger decide which definition to highlight in the notebook when Break on messages" is enabled? Here's an example to illustrate what I mean. First, enable the debugger ...
225 views

### Handling Overflow

I have a notebook which takes in a user-defined function and starting value and tracks the orbit of the particle under iteration of the function. The problem occurs when the user enters a starting ...
140 views

### Working precision for each variable

How can I define working precision for each variable individually for example: Maximize[x y< 100, {x, y}] where the working precisions for ...
153 views

### Plotting a pattern made of repeating unit blocks but of changing width

I am plotting a pattern as illustrated in link shown below. I want to create an image of fixed size. The whole image should be filled by repeating unit blocks which consist of black and green ...
2k views

### Is there a Mathematica equivalent to MATLAB's logspace? [duplicate]

Possible Duplicate: How can I get exactly 5 logarithmic divisions of an interval? I want to use Table to generate a list of items, but want the indices ...
908 views

### PlotStyle in ListPlot: change color scheme, manually choose color of first plot

Say i have this data: data1 = Map[Cos, Range[0, 20]]; data2 = Map[Sin, Range[0, 20]]; And i want to plot data1 in gray and a ...
2k views

### Forcing FindRoot to return only real solutions

FindRoot documentation reports that if the equation and the initial point are reals, the solutions are searched in the real domain. However, in the following case I ...
87 views

### How can I transform parts of an Integer list to a String list

There is a sorted list of Integers. ilist = PadRight[Sort[ RandomSample[Range[1, 99999], 3], Less], 5] It should become string area codes like: ...
740 views

### Create an adaptive amount of local variables for error propagation

I intend to write a function which calculates the result and the error for any formula with any amount of variables using the Gauß Error Propagation. The error $\mathrm{d}R$ for a function $R(a,b,c)$ ...
184 views

### Non linear constrained interger Optimization

I need to maximize the equation below which is subjected to some nonlinear constraints Maximize hsum + isum + jsum + ksum + lsum + msum + nsum + osum ...
133 views

### Difference between vector's Dimensions

What's the difference between projection= Table[Conjugate[autoVett[[k]].someVector1], {k, 1, r}] Dimensions[projection] that gave me as results ...
3k views

### NDSolve with Euler method

I want to solve this equation with NDSolve[] using the Euler method: x'[t] == 0.5*x[t]-0.04*(x[t])^2 with initial condition ...
672 views

### How to draw a Circle in a graph with Log Y Scale

I've programmed drawing tools for graph images and am experiencing a problem with the coordinates of an Ellipse on a graph with a Log Y axis. It's quite easy to work out the Y Axis coordinates for ...
105 views

### Split one string about a fixed width with SyntaxQ=True

How to split one string about a fixed width, the string may come from the input or output cell of Notebook. sample string ...
762 views

### Monitoring the Evaluation of NDSolve: time to finish estimation

My problem is quite simple: I run a NDSolve with a system of many ODEs, a calculation that will run for many hours, and I would like to know the progress of the ...
99 views

### Recurrence equations with periodic coefficient

Suppose I have the following recurrence equation: $$F_{i+1}P_{i+1}+F_iP_i-P_{i+1}+P_i=2J\,, \quad\textrm{with}\quad F_{i+L}=F_i,P_{i+L}=P_i\,.$$ $J$ is constant, $\{P_i\}$ are probabilities with ...
156 views

### Importing strings in Mathematica

This is my first post so apologies if any obvious mistakes. I'm trying to work on a data containing names (in quotes) in Mathematica. The data is already saved on my system under ...
373 views

### Map over list of functions

I would like to convert a list of $n$ complex equations to a list of $2n$ real ones. At the moment I am doing it like this: ...
743 views

### Linear regression with x and y errors

I have a question about finding a linear regression weighted with x and y errors. I found the answer provided by 0x4A4D in Estimate error on slope of linear regression given data with associated ...
135 views

### How to evaluate only arguments, but leave topmost expression unevaluated? [duplicate]

I want to represent expressions mostly in unevaluated form, but being able to evaluate it's subparts. For example, how to evaluate only arguments, but leave topmost expression unevaluated? For ...
301 views

### Interpolating function as a model in Mathematica's procedures for fitting

Is it possible to use interpolating function with parameters as a model for NonLinearModel fit (and other integrated methods for fitting)? Similar question was already posted earlier - How do I find ...
219 views

### Unresolved differential equation [closed]

Why can't Mathematica solve this equation as stated? ...
1k views

### Tips on giving a lecture course using Mathematica

I've had a look at this question on giving presentations with Mathematica which is very useful on the technical side of setting up slideshows. However, my question is more about the integration of ...
36 views

### Eigenvalues for large matrices without Root-Solution [duplicate]

I read some other questions and tried to implement the given answers but yet, I did not succeed to find proper solutions for my eigenvalues. I hope someone can show me how to do this for this case, ...
497 views

### Derive a smooth circle with cusp from an image

question 1 get the center (sample data) sample is the black circle with cusp. ...
67 views

### Adjust the results of evaluating Table so it can be used as a argument to Point

I have a list generated by Table as below. ...
120 views

### Non-Solvable PDE?

I would like to know whether this PDE is solvable and if yes, for which values of $a$. ...
145 views

### Integrating and plotting pde system solution

I have a trouble with plotting a pde system solution. I'm solving a PDE system in 2-dimensional space and then I want to integrate the solution along one dimension and build a log plot along the ...
45 views

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222 views

### Formatting results of integral approximation methods comparison.

The integral is Integrate[Sqrt[1+x^3], {x, -1, 1}]. I want to create a Table with three columns and four rows that shows the ...
111 views

### Sorting the element in a PDB text file

I am a new user of Mathematica and currently using version 9. I want to rearrange the element of one PDB text file with respect to another PDB text file. Suppose I have a PDB file like this: ...
708 views

### Parentheses in pure functions: # & vs. ( # &)

I've been using Mathematica for years, and over time I have developed the habit of using: Select[data, (# == 1 &)] instead of ...
398 views

### Using a different version of R with RLink on Windows 7

I'd like to run the R version installed in my Windows 7 system from within Mathematica 9 but when I execute the following command: ...
344 views

### Using non-trivial objects in RLink

I would like to use RLink to access igraph, which has an R interface. I do not know R; my motivation for learning it is to be able to access igraph easily. I installed igraph using ...
257 views

### InputField with Scrollbars [duplicate]

Edits are marked in bold: How do I make an InputField that behaves just like the following HTML Textarea example. ...
1k views

### Digital filter of image in Fourier space

Consider the contour plot below, of a function f(x,y) - which is calculated numerically by solving some equations. If one looks carefully, one can observe two types of waves, to the left and right of ...
216 views

### Creating documentation for sub-packages in Workbench

I'd like to create proper documentation for a package of mine, and Workbench in principle provides the tools to do this. However, I've split my package into multiple sub-packages (because I found it ...
167 views

### How to convert comment in RowBox to DisplayForm string

ToExpression[RowBox[{"a","(*","what", "*)"}],StandardForm] This conversion above ignores the commment content (*what*) The ...
177 views

### Effect of Block[] on iterators in Manipulate[]

The following is a toy example that hopefully shows the problem clearly enough. Why does the following code create a nice, manipulable output: ...
112 views

### How can I revise my program to avoid “No more memory available”? [duplicate]

I have a program for calculating a type of list. ...
587 views

### Reassign values to symbols

I've got a situation where I have, say 4 symbols, a, b, c and ...
127 views

### Simple Macro or Meta Programming for Data Analysis [duplicate]

I have a large number of data variables that are represented in MMA as symbols set to lists. For example: x = {1, 2, 3}; y = {4, 5, 6}; I want to be able to ...
113 views

### DateListPlot input entry problem

I imported some data from Excel and got the following for my date and values: {{{1986, 1, 2, 0, 0, 0.}, 25.56, ""}, {{1986, 1, 3, 0, 0, 0.}, 26., ""} It seems ...