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1h
comment Mathematica List Selection
@SquareOne you are smarter than me and seemed to have figured what OP wants. Can you write it in terms of symbols using p1,p2,p3,p4 that he showed? Does OP wants abs[p1-p2]>600 ? I do not understand how the solution shown came about, and I am drinking lots of coffee now and still do not get it.
1h
comment Mathematica List Selection
I do not understand how you came up with the answer. So, why not this one {{206.314, 4135.81}, {95.84, 0.}} for example? Maybe you can explain using point1,point2,point3,point4 it will be better. Are you looking for Abs[point2-point1]>600 for example?
1d
comment DateListLogLogPlot
The above must have been what happened as there is no other way to explain it. May be symbols in other than System` context can be show in one color and everything else in another color! Or, add a small horizontal line between System names (shown first) then all symbols in other contexts below the line next. I think mixing System symbols with user defined symbols is not a good idea in the the command completion popup menu as it is the case now.
1d
comment DateListLogLogPlot
though the Command completion feature finds it. on my system, as I show in the screen shot above, DateListLogLogPlot does not show up. Version 10.01 on windows, if it shows up on your system, this is a bug that should be reported to support@wolfram.com
1d
comment How to tell Mathematica that certain variables are real/imaginary, integer-valued, etc
But I want to tell Mathematica that some of the parameters are real (ie L) and some are integer valued you can us e ComplexExpand it says expands expr assuming that all variables are real, for integers, you can use Assuming[Element[x,Integers],Simplify[....]]
1d
comment Make plots of solutions persist
@Stephen Ok, I understand now. Yes, you can, you'd need to save all the plots done earlier. You'd need also a button to clear all. I'll add something to do this, but busy at this moment.
1d
comment Make plots of solutions persist
What about my stated question? Can LocatorAutoCreate be used to save new locator points sorry, do not see this question here? as I mentioned, it is best to have one specific question for one issue, makes it easier to answer. You can make new question specific for the new issue?
1d
comment DateListLogLogPlot
btw, there is no DateListLogLogPlot function in M? screen shot !Mathematica graphics so not sure how you ended up with that.
1d
comment DateListLogLogPlot
I just tried it again on V 10.01 and it works: !Mathematica graphics (at first I thought you did not the correct API). Can you try again after starting new kernel?
1d
comment Find the indexes of dependent columns
nice use of "AdjacencyLists", I had no idea such a thing exist.
2d
comment timing series algorithm
I think you got the wrong group? May be you wanted math.stackexchange.com but you can try floor(T/delT)+1, where delT is timing between events. Assumed the same for all. Assuming event numbered 1, starts at t=0.
2d
comment Where can I learn to use mathematica comprehensively?
comprehensive way to learn the entire system I believe this is impossible to do. Mathematica is too large and complicated to be learned fully and comprehensively in one life time by any one. You could learn parts of it well may be, but not the whole system. I do not think there any one person living who have used all of Mathematica commands for example. (well, may be MrWizard did) but I mean for the rest of us, this is impossible task.
2d
comment Export “Print” command to text file
see temporarily-redirect-the-output-of-print-to-a-second-file
Nov
20
comment How to simulate the 2-D motion of a particle under uniformly accelerated motion?
You can use ListLinePlot on your (t,x) data.
Nov
20
comment Why does LyapunovSolve solve non-standard form?
Ican't tell now, but just to note that Matlab also solves the same form as Mathematica: mathworks.com/help/control/ref/lyap.html.
Nov
19
comment Why does LyapunovSolve solve non-standard form?
whereas the standard form of the Lyapunov function When one says the standard is this and that, it will nice to show a link?
Nov
19
comment Better Autocompelete for the Front-End
Since version 9, autocomplete behaves the way it does in modern IDEs except for one big shortcoming how-to-keep-the-ctrlshiftk-help-menu-remain-in-display-while-typing (and there is no answer to this as of version 10.01)
Nov
19
comment How does Mathematica integrate?
For example it fails on Integrate[x^3 ExpIntegralE[1, x], x] as of version 10.01, M can now solve this and gives this: -x^3 ExpIntegralE[2, x] - 3 (x^2 ExpIntegralE[3, x] + 2 (x ExpIntegralE[4, x] + ExpIntegralE[5, x])) which is the same as the expression you show. (after some simplifications)
Nov
18
comment Catastrophic loss of precision
Please change the letter l to something else, say L0. I can figure if I am looking at a 1 or l in your code, they look very much the same.
Nov
18
comment Differentiation Help
it says to find the derivative derivative with respect to what? when taking derivative it has to be with respect to something.