# All Questions

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44 views

### Why do the solutions from the FindMinimum produce a lot of unphysical oscillatory points?

The parameters. Here I mention all the parameters I use in my code including some of the functions that I define for convenience Parameter set-I ...
23 views

### Using a discrete ColorFunction [closed]

I'm finding strange behavior with ColorFunction. Say I want to color a plot to indicate the sign of abscissa (this is a simplification of a more complex plot I'd like to do): ...
• 1,706
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• 85
28 views

### How to plot the input to a state-space closed loop model?

I have a mathematica notebook to build the state-space model of a system from its differential equations, calculate LQR gains and simulate the system response. ...
295 views

### Is there a better way to control "Filling"?

I wrote the following code and it works well; however, along the horizontal axis observe the "reddish" line along the interval [0.25,0.75]. It is coming from the CC = line in the code. Is ...
• 1,393
31 views

### Can I define relations without explicit transformation rules?

Is there an alternative way to use Mathematica for symbolic algebra, where instead of defining explicit transformation rules into 'canonical form', I can instead 'gently inform' Mathematica about ...
• 1,079
82 views

### Issue with unit conversion

I am getting an error converting energy unit Pa*m^3 (Pascal * Meters^3) to J (Joules). ...
• 109
264 views

### Evaluate using Mathematica or otherwise the value of $f'(0)$

If we have$$f(a)=_3F_2\left(\frac{1}{2},\frac{a+1}{2},\frac{a+2}{2}; \frac{a+3}{2},\frac{a+3}{2};1\right)$$ where $a\geq 0$ and $_3F_2$ is the Hypergeometric function with unit argument. Evaluate ...
• 97
32 views

### Solving 2D Poisson Eq with Dirichlet BC's in Python [closed]

Question: I am trying to solve the following PDE: ...
• 141
1 vote
63 views

### How to speedup integration of interpolated function with logarithmized data?

Consider some dataset corresponding to the grid x1, x2, function[x1,x2]: ...
• 5,112
54 views

### Argument value loss using Listable C-Compiled Function

In my recent studies, I have come across a very strange anomaly with C compiled functions. When I call a function that has the 'Listable' attribute while global variables are accessed through ...
112 views

• 647
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### How to set the term transfer rule of the equation? [closed]

In the following cases, the root sign, polynomial and constant terms need to be automatically identified, not manually entered. Ensure the universality of the code.That is to say, change the equation. ...
• 793
26 views

### is there anyway to solve the IDE? [closed]

I am completely new to matlab or any math softwares.I came up with this equation when trying to model a man walking through a door with a damper and constant resistive torque (not really sure if it is ...
1 vote
20 views

### How to make the Levi-Civita express the value from the package xAct?

I try to use the package xAct to compute the 1-form field from 3-form field as shown in the picture below. However, the value of Levi-Civita or epsilong does not express. How could I solve this? ...
38 views

### Solving series solution of differential equation

AsymptoticDSolveValue[2x*y''[x] -(3+2x)*y[x] +1 == 0, y[x], {x, 0, 5}], this differential equation command, is not outputting the correct solution. The solution should be like y=C1(1+(1/3)x-(1/6)x^2-(...
217 views

### Plot diagonal lattice path

I'd like to plot lattice paths like RUURUD where R is a step to the right, U is a step above ...
• 53
28 views

### Using NMinimize for a real-valued function of complex variables

I am trying to use NMinimize to minimize a real-valued function of complex arguments, with a supplied initial point. This doesn't seem to work well. For example, the following gives errors like "...
• 191
42 views

### How to simplify the formula under the quadratic root sign? [duplicate]

The following formula is given： ...
• 793
19 views

### Smoothening noisy distributions to learn eigenvalue statistics

I have a problem involving random matrices, in which I'm trying to learn properties of their spectral statistics. The problem I'm having can be boiled down to a list management issue, but I will begin ...
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