# All Questions

257 views

### Intersection of a ListPlot3D surface with a plane

I'm trying to use Mathematica to analyze some physics data from an experiment, more precisely, I have to fit a 2D data series with a one dimension function. At the moment I'm able to load and plot ...
75 views

### How to get Mathematica to abort the current evaluation if an assertion fails?

I can turn on assertions, but they don't terminate the current evaluation. For example: ...
65 views

### How can I perfect this game for Wolfram Demonstration publication? [closed]

When the messages change the window inactivates, and when I try to host an interactive CDF on my site it turns red and says something about numbers having to be scaled or offset. Any help? I'm ...
45 views

### Error message with Animate?

I have a error message, but after I execute ndsolve cell is all right.What is the Reason for this error? ...
55 views

### Using Quantity[] units causes errors in my calculation

I have an interpolation function in which I wish to use actual units. If I perform the calculation normally, it works fine and returns a proper FittedModel. To illustrate my problem, consider the ...
68 views

### Generate all 3-permutations of the set {x, y, z, w, u, t} excluding the ones where 'u' is after 't' [closed]

I have to generate all 3-permutations of a the set $(x, y, z, w, u, t)$ without the ones where the element $u$ is after element $t$. So far I have generated all the the 3-permutations like such ...
92 views

### how to read a list from a file which has mixed types of data?

I need to read in a file with the first several lines reading as ...
118 views

### Loop in a loop, or how to evaluate complex expressions

I need to find $h_{0j}$ for every $1\leq j\leq300$, where \begin{multline*} h_{0j} = \sum_{q=1}^{Q}g_qe^{-\lambda_q j\Delta}\frac{e^{\lambda_q\Delta}-1}{\lambda_q} + \sum_{p=1}^{P}\frac{e^{-\alpha_p ...
711 views

I do not have enough reputation to comment on other questions, hence I have to ask my own one I want to solve the following nonlinear first order ODE, $$(1 + x) (0.5 y[x]^{-0.5} (x - y[x])^{0.5} - ... 4answers 221 views ### How to multiply lists of data? Let two lists of data, say lst1={{x1,y1},{x2,y2},...,{xn,yn}} lst2={{x1,z1},{x2,z2},...,{xn,zn}} I need to construct a third list ... 0answers 150 views ### Incorporating photos into a Mathematica-made web page I use Mathematica to make my web page. I make various .nb files, usually with photos, and then use an Export command to convert the .nb file to an .html file with ... 1answer 58 views ### FindShortestPath does not work The FindShortestPath doesn't work in this graph, can someone tel me what's wrong? ... 4answers 312 views ### Print all numbers from a sequence which don't contain the digit 7 so i have this: Cases[RecurrenceTable[{a[n + 1] == 7 a[n] + n, a[1] == 1}, a, {n, 7}], Except[7]] But i noticed that it will only exclude numbers that are 7, and ... 2answers 97 views ### Calculating Variance (without Variance expression) I am learning Mathematica on the fly, one of my tasks is to find the variance of white noise. I followed the tutorial for finding white noise by using the code: ... 1answer 130 views ### How can I copy and paste my beautifully indented code into my notebook without alteration? Say I indent my code like this: ... 1answer 45 views ### Behavior of custom file chooser code changes when placed inside DynamicModule My primary objective is to build a file chooser that aides a user in selecting files into one of two categories. Files can be individually selected, or based on the clicking of a specific checkbox, ... 2answers 154 views ### A peculiar behavior of NSolve[] NSolve[Power[x + 1, x + 1] - Power[x, x + 2] == 0, x, Reals] returns: {{x -> 3.14104}} Great. However, ... 1answer 333 views ### Compute a hessian matrix on a image? Is it possible for Mathmatica to load a gray image and apply a hessian matrix on it?... It used image processing to find good features. 0answers 87 views ### Orthogonality relations of Hermite polynomials The Hermite polynomials are orthogonal.$$ \int_{-\infty}^\infty H_m(x) H_n(x) e^{-x^2}\, \mathrm{d}x = \sqrt{ \pi} 2^n n! \delta_{nm}  Does Mathematica not use this relationship? Because running ...
I want to see the Taylor series representation for arbitrary functions, e.g. $\sin$. With the Series[] command, I can only see the first $n$ terms. Is there the ...