# All Questions

238 views

### How would I plot the volume element in cylindrical coordinates?

I have this graph: But it doesn't have a function so I can't just plugin in a function into wolfram or mathematica to plot it. I have these coordinates to make it however: ...
105 views

### Nested NDSolve with WhenEvent: setting up new equations and discarding old ones

I am checking a complex situation where a function x1[t1] only exit in a finite time span, and after this a new function x2[t2] ...
194 views

### Union of plotted regions as sum of colors

I wish to plot 2 functions $f$ and $g$ so that the region bounded by $f$ has color $c_f$, the region bounded by $g$ has color $c_g$, and the region bounded by both has color $c_f+c_g$. E.g. $c_f$ is ...
66 views

### Use boundaries of one plot for another

I am writing some code in which I combine a ParametricPlot[] with a RegionPlot[]. Mathematica is very good at figuring out ...
158 views

### Creating a custom context with a Hold construct

I'm trying to create a function "InContext" to execute a piece of code inside a certain context (and to return the result of evaluating that piece of code). One approach is to place the code inside a ...
134 views

### Volume within parameter space

Imagine a parameter space with variable 0<p<1, 0<e1<1/2 and 0<e2<1/2. ...
101 views

### arthmetic progression problem series upto 40 terms? [closed]

Find the sum of series 5+7+9+10+13+13+17+16+....., upto 40 terms? Please help i am facing problem while solving this question.i have tried my best to solve this but unable to find the common ...
99 views

### Check that a relational expression is true for all complex numbers

How can I use Mathematica to check if a statement like $$\left| \frac{\sqrt{1+2z}-2}{2z-3} \right| \le 1$$ is true for all complex numbers $z$? Also, how can I use Mathematica to check such a ...
167 views

### How to insert / merge a list into another list?

Background: I am working on a 2D geometry algorithm where I need to insert a list of 2D points into another list of 2D points. Somewhat to my surprise I found no Mathematica function capable of doing ...
311 views

### How can I remove the singleton dimensions of an array? [duplicate]

If I have an array A, for which Dimensions[A] is {9, 9, 1, 1, 3, 4}, how can I convert ...
70 views

### Mathematica Error Message using CylindricalPlot3D

I have a full version of Mathematica Home Edition 9 installed on a high end desktop. I'm trying to learn how to use it and keep coming up with an error message that I cannot figure out. I want to ...
188 views

### Integration of Two Manipulatable Cylinders

Introduction I created the following code to simulate the many possible interactions between a cylindrical protein crystal and a x-ray beam during serial femtosecond crystallography. ...
45 views

### Error plotting delayed expressions [duplicate]

I have defined: Qq[T_] := Exp[-w/(2 T)]/(1 - Exp[-w/T]) Uq[T_] := T^2 D[Log[Qq[T]], T] Can someone explain why this expression work: ...
275 views

### Filtering and Replacing outliers

I have a set of data that measurements of temperature vs time (date). It is easy to realize when the sensor went wrong as one might see a blip on the data. How to teach to Mathematica to: 1) Detect ...
176 views

### How to reconstruct a missing data point

In the output of a large computer simulation(thousands of cpus for 3 days), I found that one data point is missing in the result. Is it possible to reconstruct the missing value using the remaining ...
101 views

### How can I close a stream without knowing its name?

If I initialise a stream as follows OpenWrite["~/example"] How do I close this stream? Close seems to expect a name, but I ...
915 views

### Is Mathematica v10 on the Raspberry Pi licensed for classroom use? [closed]

Now that I have v10 running on my Raspberry Pi, I'm interested in what "personal and educational use" means. As a Home user, I fully understand "personal"... but does "educational" mean that I'm free ...
74 views

### How do I use Greek characters in the WindowTitle option of CreateWindow?

I am trying to write some exercises in Greek using CreateWindow. My problem is with using Greek characters in the option ...
101 views

### Explicit, closed formula for recursive integral as a function of the recursive parameter

This is a follow-up of this question/answer. I'm working on a recursive integral more complicated than the one on the linked question, but this one can be used as an example. I would like to obtain ...
135 views

### How can multiple null terminated strings be handled in a DLL-function result?

I am trying to connect a classic System Dynamics tool (Vensim DSS) with Mathematica using a DLL that is included in Vensim DSS. Reading though the instructions on how to define DLL functions on how to ...
113 views

### Integrate perfomance

I have a notebook in Mathematica 4. I'm trying to convert it to use in Mathematica 9. One of the problem is the long computation of definite integral in the new version of Mathematica. Here's the ...
148 views

### Remove versus ClearAll

What is the difference between Remove and ClearAll? I thought that "not being recognized by Mathematica", which is the effect ...
286 views

If we have nested matrices, such as: $$\begin{bmatrix} \begin{bmatrix} a_{1,1} & a_{1,2}\\ a_{2,1} & a_{2,2}\\ \end{bmatrix} \begin{bmatrix} ... 2answers 116 views ### Interpolating a list with exclusion [closed] I have a list, data, where the elements data[[i]] range over i from ... 1answer 138 views ### Plotting continuous functions on integers [closed] How can one plot a continuous function of the variable x, say f(x), but only for integer values of x=n with n\in\mathbb{N} - i.e., as it was a List? 1answer 100 views ### Plotting the solution of a 2nd order equation I have got to solve a second order equation, where the coefficient depend on the parameter k:$$(A_k - \omega) (D_k- \omega) - B_kC_k = 0$$so that also the solution \omega=\omega(k) will depend ... 0answers 130 views ### Plotting basin boundary How to plot the basin boundary in Mathematica? I have been trying to do this using the system ... 1answer 173 views ### What is the principle behind Dispatch? I want to know what Dispatch actually does to rule the list. Why is it so fast? The documentation says Dispatch generates a dispatch table which uses hash ... 1answer 110 views ### Start animation after choosing of initial values without Animate I want to simply set some parameters with sliders and click a button to start animation. I know that I can manage this with Animate and Manipulate, but my animation is written like in this post, ... 2answers 160 views ### Best method to do a List Plot of two series with the same x-Axes [duplicate] I want to plot two data series with the same x-Axes. I can use Show for this purpose, but I don't know if it is the best way, because I've to set all options two ... 5answers 169 views ### How do I find the maximum value from the given set of data? I have a set of data like {{x1, y1},{x2, y2}, ...,{xn, yn}}. From this data can I find the value of x for which ... 1answer 81 views ### Use a pre-computed list instead of RandomInteger I would like to replace RandomInteger[{1, 10}, {10, 10}] in the following code: ... 1answer 78 views ### Integrate and ConditionalExpression Output I am integrating some difficult functions and using the conditional output to place bounds on parameters to ensure integrability, but it seems that not all of the conditions are being returned. The ... 3answers 186 views ### Multiple output cells Is it possible to have multiple outputs from a single function? For example: In[1]:= x+1 x+2 Out[1]= 1+x Out[2]= 2+x has multiple outputs, how can I ... 1answer 120 views ### How to use NyquistPlot without having a transfer function model? Could anyone tell me how to use NyquistPlot with a first argument that is not a transfer function model? The expression I'd like to pass to ... 1answer 201 views ### Combine a dynamic module with a manipulation I would like to combine a dynamic module with a manipulation, whilst maintaining the functionality of both. I have tried things like Show and ... 2answers 131 views ### How to insert trigonometric functions into matrices' vector components? [closed] Is it possible to insert a trigonometric function into a matrix which will be able to be used dynamically, as an element of one of the vectors of the matrix? I'm trying to perform an operation like ... 5answers 240 views ### String replacement question If you have a string string="<ALK>ene" and I have a list alk={"meth", "eth", "prop", "but", "pent"}, what function ... 2answers 144 views ### Additive SparseArray Assembly The goal is to assemble a SparseArray in an additive fashion. Let us assume we have a large List of indices (some will be ... 1answer 248 views ### How to insert a plot into another overlay plot I want to insert a plot into another overlay plot. Here is my code: ... 2answers 129 views ### Conditional Table I have following : SeedRandom[2] Table[Table[RandomInteger[100, {100, 10}][[r, s]] == x[r + s], {r, 1, 10}], {s,1,10}] How can I set condition inside Tables?Such ... 1answer 75 views ### Exporting Dynamic@Graphic with Mathematica and Player Pro Why does ... 3answers 2k views ### Is Mathematica an Implementation of the Wolfram Language? I am trying to figure out what the announcement of the Wolfram Language means for Mathematica. Is Mathematica an implementation of the Wolfram Language, or is it something else? 1answer 115 views ### Partitioning a numerical integral: need to integrate spectra I am trying to integrate a spectrum I obtained from a fourier transform infrared spectroscopy experiment, in order to determine the global warming potential of green house gases. In order to do this, ... 1answer 71 views ### A few specific questions on a number of plots in a do loop I have created the picture displayed below, with the following line of code: ... 1answer 110 views ### Programming Multipolar Expansions in Spherical Tensors We have that a density matrix can be written in a basis of spherical tensors: \rho =\sum _{K=0}^S\sum_{q=-K}^K \rho _{\text{Kq}}^{(S)} T_{\text{Kq}}^{(S)} for example for a 3x3 matrix, S=1, ... 1answer 113 views ### importing large data files with a constraint As I have learned in this community, one way to import a hefty data files (e.g. millions of rows of {x1, y1} data) if you don't care about the individual elements (maybe just want to obtain some ... 0answers 49 views ### Symbolic representation of bessel series derivative I want to get symbolic expression for BesselJ derivative, where BesselJ is represented as series: ... 1answer 112 views ### How can I plot a picture with this kind of legend? Can "plotlegend" do that? I cannot find a proper function. 1answer 196 views ### Computing a series in terms of exponential function Is there any way to compute the following series in terms of exponential function ?$$\sum_{k=0}^\infty Y_1(k)\;x^k$$where$$Y_1(k) = \frac{(k - 1)!}{k!}Y_3(k - 1)Y_2(k) = \frac{(k - ...

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