All Questions

I am trying to ParametricPlot two Piecewise functions. Here are my two Piecewise functions: ...

If I plot a function just like that Plot[Sin(x), {x, 0, 3Pi}] I'll Get a plot whit the x betwenn 0 and 10, I'll like to know how can I could modufy the x axes ...

I wish to debug my NDSolve function and this is my first time using the Mathematica debugger. I have read around and attempted various different ways of debugging but I cannot figure it out. I want to ...

How do I plot a sampling of gradient vectors for fby using the vectorplot command? I’m confused how to use both these commands.

I try to convert this code Matlab code: ...

I know I can use the Property interface for things like Graph but I want to use it for all of my objects. This includes: ...

I have two long functions g12 and g14 in terms of g2: ...

This is my list Matrix = {{1, -2, 3, -4}, {{a, b}, {f, e}, {a, b}, {f, e}}} I want to order the columns in ascending order depending on the values on the first ...

I have the following code: ...

I want to build the graphic using ListPlot but it doesn't work. I get list in next form: ...

I dont understand how to interpret C[i] returned from a definite integral when there are no C[i] terms in the actual answer, only in the conditional expr. Thanks! Dan

Currently i'm stuck at problem, where i have a sets of points, and I wish to plot these point with different plot markers, and also with different plot legend. The code is the following: ...

Here is one way to find the names of the files in one's home directory: FileNames["*", "~"] (* { "~/.account", "~/Applications", "~/.bash_sessions", ... } *) ...

I'm a Ph.D. student in Banking and Finance and I'm not familiar with the solving system of equations. I don't know how to solve the two equations below to get the approximation value of x, and y. All ...

In order to avoid script-defined command-line arguments clashing with existing arguments to wolframscript, it appears you are supposed to use the ...

I'm a bit new to solving differential equations in Mathematica. I want to solve the differential equation for f(R): Eq = f''[R] + K2[R]*f[R] (*=0*) With the ...

I was wondering if there is some shorthand in Mathematica for expressions such as $$\left(\int_A + \int_B + \int_C + \cdots\right)F(x_1,\ldots, x_n) dx_1\cdots dx_n$$ where $A,B,C,\ldots$ each ...

I have the following integral: $$ \int_{-\infty}^{\infty} \frac{\mathrm d\tau}{2\pi \mathrm i} \int_{-\infty}^{\infty} \frac{\mathrm d\tau'}{2\pi \mathrm i} \frac{\mathrm e^{-c^2(\tau - \tau')^2}}{(\...

I would like to do a small demonstration of Monte Carlo integration. However, When I generated the plot code, it does not work properly. ...

How can I invert the grayscale colors when using MatrixPlot? My data is between 0 and 1 and the color scheme when using GrayLevel...

Dynamic has been really useful for me but it is as well not easy to understand also. I am doing a calculation where I want some of the input fields enabled or disabled depending on where I am in the ...

I have a list of pictures: pictures = {im1,im2,im3,im4,im5,im6} Where im1: im2: im3: im4: im5: im6: I want to assign the pictures to labels (1,2,3,4,5 ...

Mathematica has found that the maximum of the following function is negative using NMaximize, but I am trying to prove that the maximum is negative (i.e. that the ...

I have a list of tuples like this: {{1,a,b},{1,1,b},{1,a,a},{b,a,1},{b,a,b}} I would like to find a way to delete all those tuples in the list that contain a ...

I had been trying to limit for some c++ programs, the bigest whole number they can handle is lim = 18446744073709551615 and the different functions are: ...

I tried to fit my data with a very complicate Integrated function. But I get many errors messages when I perform the fit. For exemple I get : NIntegrate::inumr: The integrand ....has evaluated to ...

I am trying to simulate a model in SystemModeler from Mathematica 11.3. I wish to simulate this model for various parameter values and make a table of the output data. To attempt this I do the ...

I am looking for a way to randomize the initial conditions on the numerical approximation for the angular displacement of a plane pendulum. I have been trying for hours, and believe a For loop is ...

I have a model with many parameters, and I'd like to see how the model changes when some of those parameters change. Right now many of those parameters are set to prescribed values, i.e., ...

I recently asked a question: Finding Intersections Between Arbitrary Surface and A Line whose solution required me to use the GroebnerBasis function. I successfully ...

Below, I have included some data. (It is long, but I don't like to host data elsewhere and provide links that might some day be broken.) Plotting this set of data,...

I just want to figure out how to "represent" or to inject an interpolating function into a numerical calculation. So, suppose i have an interpolating function $int$ and then i want to use NDSolve or ...

Assume that we have a 3D array x, and we would like to split it into 2D slices then cut every slice into some small patches and get all patches in single list ...

I am using FindMinimum command to find a local minimum of an object function. My code is below ...

Is it possible to tell Mathematica to assume a variable is a matrix, analogous to assuming a variable is real with the Assuming command?

I am trying to put a 16x16 complex matrix in a row, with separated columns to real and imaginary parts (i.e a 1x512 matrix). Additionally this 16x16 matrix is generated by an operator ...

I would like to do something like CellularAutomaton[10, {1, 0, 0, 0, 0}, 2^5], but instead of running for 2^5, it should stop as ...

qThis is my code. R = 12.17 g = 9.8 θ = 36 Degree Solve[R==v*cos[θ]*(v*sin[θ]+sqrt[(v*sin[θ])^\.1d2 \[Minus] 2*g]), v]` What is the problem with this code?

I have a code in which I define something like this: cc[1, 2] = 1; cc[2, 6] = 12; cc[3, 7] = 3; After some manipulation I define a sort of temporary variable ...

I have some code which numerically solves a differential equation for a given value of the parameter $M0$ and for some initial conditions. The initial conditions will remain fixed throughout the ...

Any Ideas how I could convert unicode to Mathematica Input ? For instance : I have the following Unicode: test= {"a", "\\:1d62"} So here I would like to convert ...

I have a large list of uniform-length lists. What is an efficient way to delete component lists that contain duplicates? For three-item sub-lists, I have used the following code: ...

For finite element purposes I need a frustum of a cone with a finite wall thickness, i.e. a tapered pipe. To make a cone is easy ...

Can anyone help me to find the series expansion as a polynomial of the following multi-variable function with singularities? f[x_, t_] := 1/(x - t)^(1/4) Where <...

To solve optimization problems I have seen this: Is there a more elegant way to do this with alternative conditional expressions? Is there something equivelant to ...

Dears, I am trying to solve the equation in the below picture. What I did is: I used wavelet functions and substitute the wavelet instead of u, where I have the ...

I recently wanted to calculate the power spectral density of a surface profile. I was happy to find out that there is a built in PowerSpectralDensity[] function in Mathematica (version 10). However, I'...

I have developed the following code, which produces what I aim to obtain. ...

I am trying to solve for the minimum distance between a line and a cone, for all possible lines in 3D space. I've formulated this as a call to Minimize, but it ...

Here I am going, as a matter of illustration, make a large string list: l = Characters[WordList[]]; l = Table[DeleteDuplicates[l[[i]]], {i, Length[l]}]; This ...