# All Questions

501 views

### Graphics3D model of the human body and organs?

Does someone have a 3D model for a man (or woman) that can be displayed in Mathematica using Graphics3D? I have tried importing free .3DS models but they look ...
182 views

### Circle as a function parameter

What I want to do is to find a circle which is tanget to the three big ones. I tried the code below: findSmallCircle[c1_Circle, c2_Circle, c3_Circle] := ...
434 views

### Boundary condition for stochastic differential equation

I have a simple stochastic differential equation (SDE) with white noise: ...
2k views

### Mapping a pure function with multiple slots [duplicate]

Here is a pure function with multiple slots: (#1^2 + #2^2)&[3, 4] 25 But how can I map that pure function over lists of values? For example, say I want ...
140 views

### Notebook output behaving erratically

Normally, when reevaluating a cell, the following output cell is overwritten with the new result. I have a lengthy notebook in which at some point for unknown reasons each reevaluation generates a new ...
614 views

### Why doesn't FindRoot work correctly?

I'm trying to find the roots of the following equation: I need to find λs for different values of ξ. I know that for all ...
134 views

### Techniques Modifying Cells M8.0

What techniques are there for modifying/organizing/selecting/deleting cells? I understand Mathematica 9.0 has a Cells function but what techniques exist in Mathematica 8.0? The documentation for ...
75 views

### SuperscriptBox question

I am trying to define an object type in Mathematica as follows ...
75 views

### SiegelTheta fails to evaluate when given proper arguments

SiegelTheta often returns error messages when I give it arguments that should be of the correct form. For instance, I have a numerical matrix like ...
254 views

### Manipulate Slider over discrete collection. Keyboard control.

I would like to create a Manipulate slider that iterates over a discrete set of items. Something like the following ...
296 views

### How to fix MIDI playback on OS X?

Sometimes sounds specified using SoundNote (i.e. things played using MIDI) don't play properly on OS X. Some notes are missing and some are stuck. At least this ...
1k views

### Solve inhomogeneous Poisson's equation, gives no result at all

I would like to solve the following two-dimensional inhomogeneous Poisson's equation in Mathematica including specific boundary conditions, and I know that an analytical solution exists, but ...
388 views

### Looking for an elegant way to construct this tensor-product-ish list

I would like to make the following matrix: ...
84 views

### Function or script which maxes out the CPUs?

I've been using Mathematica for awhile now and have never come even close to maxing out my CPU cycles. Are there any functions which consume lots of CPU cycles? Right now I am running a script which ...
108 views

### Performing operations on function lists

I am exploring the use of Dynamic variables for the ViewPoint and ViewVertical options in a ...
118 views

### How to pop out of a subsection in a notebook

Let's say I have a section in a notebook, which I begin with a cmd-4 keystroke. I type in some text and expressions, and now I want to introduce a subsection for ...
73 views

### how to generate repeatable Unique streams?

I need to label some data in arbitrarily nested ragged lists, with a stream of unique labels. It's very convenient if the labels are consecutive integers, starting at 0 or 1, and if I can produce the ...
105 views

### Export file with semicolon at the end of line

Is there a rule that tells Mathematica to set a semicolon at the end of each line (except of the last one)? My MWE is: ...
1k views

### Units, plotting and empty plots

maybe I'm completely newbie but I can't understand the behavior of units and the command plot. I'm doing some easy plotting of the state equation for gasses: ...
141 views

### Changing “Block[]” to a Manipulation

I have a graph here and I want to be able to manipulate the 4 parameters that are in the Block command. I want to watch the graph change as I change the parameters. I've done this before, but the ...
360 views

### Retrieving Data from Excel Using NETLink / Pulling data using RTD Link

Reference: I've looked at the posting Open excel file with Mathematica. My intention is to be able to use Excel's RTD capability in order to pull market data into Mathematica. To my knowledge, this ...
1k views

### What do the hashtags represent in the result of Solve, and how should I use them? [duplicate]

There is a function that I'm trying to get the inverse of. My function is a simple polynomial: Tn[T_] := 4/9 T^3/Tc^2 + 5/9 T Now I tried to find ...
348 views

### To what extent can NonlinearModelFit be sped up?

Can NonlinearModelFit be parallelized or compiled to allow one to achieve a scalable speedup for a fitting procedure? Attempting to use this function to fit a ...
538 views

### How to switch off messages on all kernels?

I am using ParallelMap for my code,however, it gives some messages that don't affect the evaluation process but fill up the memory and take some more time. So, I ...
37 views

### I'm definitely giving an integer, but I get Nest::intnm [duplicate]

I am attempting to make a small interactive plot that displays the plot of Cos iterated its times. Whenever I try to evaluate my ...
103 views

721 views

### Removing not-a-number entries from an array of numbers

I have a list of {x, y, z} coordinates from a wavefront sensor I'm working with. However, not all of the imported points have actual values, but they still get ...
25 views

### Converting the output for variable assignments to a usable array form [duplicate]

Output from built-in Mathematica functions often has this form (e.g. from Solve): {1 -> {166., 254.214}, 2 -> {237.214, 254.}, 3 -> {121., 253.5}, 4 -> ...
72 views

### How can autocomplete entries be added for DownValues and Properties?

I'd like to assign DownValues to a symbol like this x["firstvalue"] = 1; x["secondvalue"] = 2; And then have the ...
463 views

### Isolating a prefactor in an analytical expression

I have a large mathematica expression that looks roughly like f = A1 Exp[a1 x] + A2 Exp[a2 x] + b1/x + b2/x^2 + c0 + c1 x + c2 x^2 where all the ...
931 views

### What is the default ColorFunction for 3D plots?

This should be a really simple question, but it isn't in the documentation for some perverse reason. I like the default ColorFunction that Mathematica uses for ...
623 views

### ParametricPlot with DSolve does not show anything

I manage to plot strn[t] and sig[t] where sig[t] is the solution from my DSolve. However, when I want to ParametricPlot sig[t] vs strn[t], I failed to do it as the parametric plot does not show ...
311 views

### Why doesn't Mathematica evaluate this limit?

I am trying to evaluate a few limits in Mathematica, and I can only get it to evaluate them in certain cases. I don't fully understand the evaluation order and when it substitutes numerical values in ...
141 views

### How can I make a plot of data saved in a .txt file? [duplicate]

My file. Txt has only two columns, where the 1st column is the time that the data was generated by the 2nd column has decimal values ​​1-100. Example: ...
410 views

### How to debug Mathematica crash?

If i have some program which crash Mathematica every time it's run. What are the steps to make a more informative report and/or how do i go about debugging it? EDIT: I guess essentially my question ...
584 views

### BVP - shooting method

I really don't know how to realize this method. The examples in internet and the reference aren't helpful for me. 1) I have the values for today: ...
239 views

### Plot image function together maintaining compatibility between their coordinate systems?

Is it possible to plot an image, i.e., draw it's pixels against usual coordinates? My goal is to plot my image and my function in the same coordinates. Update I drew an image of size ...