Questions tagged [mathematica-online]
For questions specific to the Wolfram product Mathematica Online.
163 questions
0 votes
0 answers
59 views
How can I export graphics in Mathematica Online (hosted at Wolfram Cloud) and access the exported files? [duplicate]
I am working with Mathematica Online and I want to export graphics (e.g. plots) to a file. I tried using Export["myplot.png", plot], and it does create the file — but it seems to be written ...
2 votes
1 answer
114 views
How fix error in Mathematica "NDSolve::ndsz: At t == ... step size is effectively zero; singularity or stiff system suspected" when using Manipulate?
I am trying to solve a nonlinear system of differential equations in Wolfram Mathematica using NDSolve and visualize the solution with Manipulate. However, I encounter the following error when running ...
0 votes
0 answers
75 views
Contract::fail Error in FeynCalc When Using Calc[FullSimplify[Y1]] /. momentumRules
I’m working on a quantum field theory calculation in Mathematica using FeynCalc, and I’m running into the following error: ...
6 votes
2 answers
493 views
An integral using Mathematica or otherwise
Consider the unit square integral $$I=\int_{(0,1)^5}\frac{x(1-x)y(1-y)u(1-u)v(1-v)w(1-w)}{(1-(1-xyuv)w)^2}\ dxdydudvdw$$ Using Mathematica or otherwise I need a closed form of I, possibly in terms of ...
1 vote
2 answers
99 views
How can I change design a function $Modu$ such that $Modu[2k,2]$ to be zero?
I am dealing with some calculations of integer variables, so I want to define a function $Modu[x]= x \; mod \; 2$ such that $Modu[2x]=0$. If I directly use $Mod[2k,2]$, the output should still be $Mod[...
0 votes
0 answers
83 views
Forecast of 100 days prices using ARIMA-GARCH model but I encountered error saying the input for garch model is not valid
The below section is the data I take to do the ARIMA-GARCH model. ...
1 vote
0 answers
95 views
Numeric coefficients of a series/polynomial
In my work, i usually come across expressions of the form: $$\text{L3}=\frac{625 f_5^{30} q^4}{f_1^{31}}+\frac{24458 f_5^{24} q^3}{f_1^{25}}+\frac{25436 f_5^{18} q^2}{f_1^{19}}+\frac{25415 f_5^{12} q}{...
3 votes
4 answers
235 views
Sort Column as a Row
I have a = {1, 2, 3, 10}; b= {2, 3, 4, 8}; t= Do[If[a[[i]]+b[[i]]>3,Print[a[[i]]],"No"],{i,1,4}]; 2 3 10 I need to get the result; t={2,3,10}