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How can I improve significantly the speed of the following code?nmax = 10000000;r = Range[nmax];res = ({#, #^2, If[Mod[#, 2] == 0, "even", "odd"]} & /@ r); // AbsoluteTiming{15.3145,...
Asked on 04/01/2021 by mrz
2 answerIf the equation of the circle in the Minkowski 3 space is given as$S_1^2 = {x in E_1^3:- x_1^2 + x_2^2 + x_3^2 }$, how can I replace...
Asked on 04/01/2021 by Heba Serry
1 answerThis has a connection to the previous post here:Using a complicated function as color functionAlso, a recent post of mine appeared here:Create a colorbar plot...
Asked on 03/31/2021
1 answerI'm using Mathematica 12.1.1.0. When I enterListPlot[{{{1500, 4}, {1510, 4}, {1520, 4}, {1850, 6}}, {{1500, 1}, {18100, 1}}}, PlotLabels -> {"a", "b"}, Joined -> True,...
Asked on 03/31/2021
2 answerI would like to give some context: I need to analyse many data sets stored in files using different kind of analyses. To keep track I like to tag each...
Asked on 03/31/2021
1 answerI’m trying to solve u_xx + x/2 u_x = 0, with t=0 as x goes to infinity, not sure how to impose initial conditions though? Thankyou...
Asked on 03/31/2021 by Malvika Pal
1 answerHow do I plot the graph of x^2,x^4, in the same graph for x in [-5,5].PlotRange->{-5,20},PlotLegends-> "Expressions"].I thought the input would bePlot[{Sin[x^2],Sin[x^4]},{x,-5,5},PlotRange-> {-5,20}, PlotLegends-> "Expressions"] ...
Asked on 03/31/2021 by user74968
0 answerI need to NDSolve a system many times by scanning some of its parameters and do some matrix calculation with the (discretized) solutions. The example is the following code. The...
Asked on 03/31/2021
1 answerHelp me please to understand how to solve many EDP with Mathematica.weqn = D[u[x, t], {t, 2}] == D[u[x, t], {x, 2}]Ivi = {u[x, 0] == 1}Ibc = {u[0,...
Asked on 03/31/2021 by anthony villacis
1 answerHow can we replace the vertices in a 3-dim graph with individual Graphics3D objects? In my concrete case I want to visualize a chemical network and replace vertices with their...
Asked on 03/31/2021
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