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| I am trying to set up and solve a 2D Laplace differential equation for an electrostatic voltage using the finite element method. In the problem, I have many identical parts in a row along the x axis. Each rectangular part contains four electrodes:... |
| I am trying to solve Laplace's equations in two-dimensions in order obtain the voltage field with specified regions and boundaries. One of the regions in the problem is a half-disk. I wish to specify a voltage on the boundary of that half-disk. I do... |
| I want to use gf[x_, y_] := Module[{x1, x2, xtst, fnw, f1, xnw}, xtst = Total[x]/2;fnw = LAcr[xtst, 1/12., LAI, LBI, AF, a, b, c, d, 400000.,a, y]; f1 = LAcr[x[[1]], 1/12., LAI, LBI, AF, a, b, c, d, ... |
| I know there is some sort of external function to convert Log[x]+Log[y] into Log[x y] but cannot find it. Any help? |
| Consider the system NDSolve[{y'[x]==g[y[x],x],y[0]==q},y[x],{x,0,xf}]; g[x,y[x]]=Module[{gs,res,g0=0},gs=FindRoot[h[x,y[x]]==0,{g.g0}];res=g/.gs[[1]];Return[res] This always gives error messages of the form FindRoot::nlnum: "The function value... |
| I have an array with a structure like {{a,b},{{c,d},{e,f}}} . It appears to save and import, but when the imported array is examined in FullForm, it is incorrectly structured. Thus the original array in FullForm looks like... |