# All Questions

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### Multivariate integration of a compicated expression

I have an expression in multiple variables that is something like ...
33 views

### Table giving error Part::pkspec1: [on hold]

I am evaluating the following expression: ...
95 views

### Inflection point and curvature

Through a coordinates list and then interpolating them I got a $f[x]$. ...
373 views

### Gillespie Stochastic Simulation Algorithm

The Gillespie SSA is a Monte Carlo stochastic simulation algorithm to find the trajectory a dynamic system described by a reaction (or interaction) network, e.g. chemical reactions or ecological ...
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### About changing the values of global parameters within a function [on hold]

For the code below: a = 1; b = 2; f[c_, d_] =: Module[{e, f, g, h, ...}, ...]; I have references to a and ...
107 views

### How to remove parts of an expression [on hold]

I have an expression where terms Transpose[R].R appear. R is a matrix with the property Transpose[R].R=IdentityMatrix[3]. How ...
44 views

### Chains of approximate numeric equalities

Mathematica considers two numbers equal if "at most their last seven binary digits" differ. For example: ...
25 views

### Using the TwoAxisListPlot Package and Show Together

I am using the TwoAxisListPlot package to generate a plot with two y-axes (obviously!). I have made a NonlinearModelFit to one ...
27 views

### How to open and use the blackbody radiation program in Mathematica [on hold]

I am trying to open and plot the blackbody profiles for four different temperatures which are (2000,1000,400,100)K. The y coord runs from 10^-4 to 10^6 and the x coordinate runs from 10^-10 to 10^-4. ...
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### plotting quaternary [duplicate]

For more information to draw tetrahedron like figure for my data i again insert my data. I have 4 sets of data in 4 axis (x1,x2,x3,y) x1=0.0557 0.0575 0.0613 0.0656 0.0615 0.0448 0.0488 0.0595 0.0654 ...
33 views

### Multivariable non-linear fitting

I have a function called "C" that I know it depends on 6 variable. I have a set of data points, 6 rows by 9 columns, in which in each row only one variable is changing and the rest of the variables ...
83 views

### Bug in the “PrincipalValue” method of NIntegrate?

Update As pointed by Emilio Pisanty, one should pay attention to EvaluationMonitor to monitor principal value integration. I update the codes, and find some more ...
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### Do double vertical bars in ConditionalExpression mean 'or'? [on hold]

I have a very simple interpretation question. I think that double vertical bars in a ConditionalExpression given by Mathematica as the result of an integration must mean 'or', but I am hoping to ...
117 views

### How can I draw ternary plot by these data?

I have these data and want to draw similar fifures in mathematica. any one can help me? ...