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Sep
22
comment Steps in row reduction?
Only way I know to look into LU more is by using the {lu,p,c}=LUDecomposition[m] call, where c gives the rows used for pivoting as mentioned in the help. You can't tell how to control the pivoting. There is no option there. from reference.wolfram.com/language/tutorial/… it says LUDecomposition, Inverse, RowReduce, and Det use Gaussian elimination with partial pivoting. That is about it.
Sep
22
comment Is this integral solvable?
You can try the free Wolfram cloud, it has Mathematica there for free wolfram.com/programming-cloud/pricing click on the free option. Also can try Wolfram alpha, it is supposed to be able to do integration as well.
Sep
22
answered Different results of a definite integral $\int_0^{\cosh ^{-1}(a)} \frac{1}{\sqrt{a^2 \text{sech}^2(x)-1}}\, dx$
Sep
22
comment How to remove error at large time in NDSolve
it works ok for me using V 10.01 on windows. moved the slider all the way to the right and I see no errors. !Mathematica graphics may be you can upgrade to 10.01
Sep
19
awarded  Generalist
Sep
18
comment Tracking Initialization
@MichaelE2 I know for Manipulate that the following happens, and I would assume the same for DyanmicModule, since Manipulate is just a DynamicModule: The body of Manipulate (the expression part) is checked for valid input/form, but it is not evaluated until Initialization is finished. The question of when Initialization is run or not is separate. But when it needs to be evaluated, then yes, the body/dynamics/expression will wait until Initialization is finished running.
Sep
18
comment Tracking Initialization
I do not think what I said is different from what you are saying. Initialization is evaluated to generate the dynamic expression first time it is needed to be displayed on the screen.
Sep
17
comment Tracking Initialization
I am not sure I understand what you mean by this tracking to be reflected in Dynamic updating Since Initialization is processed once from top down. (to generate the initial expression). Once this is done, Initialization basically goes away.
Sep
17
comment Tracking Initialization
You can always use Print :) DynamicModule[{x}, Dynamic[x], Initialization :> (x = 1; Print["x=2"]; x = 2; Print["x=3"]; x = 3) ]
Sep
17
asked StateSpaceRealization “ControllableCompanion” does not generate ControllableCompanion form from DE
Sep
16
comment Manipulate a parameter within the PlotLabel
f = {1, 2, 3, 4, 5, 6}; Manipulate[ Plot[Sin[f[[g]] x], {x, -2, 2}, PlotLabel -> Row[{"f = ", f[[g]]}]], {{g, 1, "index"}, 1, Length[f], 1, Appearance -> "Labeled"} ]
Sep
14
revised Wrong answer from DSolve?
added error message
Sep
14
answered Wrong answer from DSolve?
Sep
6
awarded  differential-equations
Sep
5
comment Mathematica 10 loads too long time
fyi, some discussion related here community.wolfram.com/groups/-/m/t/291612?p_p_auth=CDjlQwC5 "Can my start up time for Mathematica 10 be decreased?" do not know if it is the same issue as you are having.
Sep
4
comment Giving hints to Integrate
could you rewrite this without using the letter l as variable? Makes it hard to read as you have 1 and l next to each others.
Sep
4
answered Why do NDSolve and OutputResponse not evaluate non-analytic functions numerically?
Sep
4
answered Laplace: from differential equation to transfer function
Sep
1
answered ToDiscreteTimeModel fails following video
Sep
1
answered Use MATHEMATICA to calculate the volume of the solid