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Nov
14
comment Calculating an integral by the Romberg Algorithm
I do not understand why you are dealing with Precision stuff in the implementation of this algorithm. I've implemented this also for a HW assignment but do not have time to post it now. I think you are making things much more complicated than needed with adding Precision in there.
Nov
13
revised Problem with a Markov's Matrix
I meant the sum to be over rows, corrected the corresponding code.
Nov
13
answered Integrate[] does not work when the function has an antiderivative function
Nov
11
comment Equation is solved quickly using Solve but takes too long using NSolve
fyi, Maple fsolve says " The fsolve command numerically computes the zeroes of one or more equations, expressions or procedures." so I assumed it is like NSolve. maplesoft.com/support/help/maple/view.aspx?path=fsolve
Nov
11
comment Equation is solved quickly using Solve but takes too long using NSolve
fyi, I tried this on Maple, using fsolve, which is the Mathematica version of NSolve, and Maple solved it instantly. Screen shot: !Mathematica graphics I wonder if this mean Maple is using some other fast method to numerically solve this.
Nov
11
comment Equation is solved quickly using Solve but takes too long using NSolve
I think the way you wrote your equation is not clear. It should be written as (1 - 2.25577*10^(-5)*h)
Nov
11
comment PolarPlot with Dashed and PlotRange freezes for simple function
on V10.1 windows 7, I get no crash and empty plot? !Mathematica graphics ps. for problem like this it is best to give version number and platform.
Nov
10
answered Simple plot control
Nov
10
comment FindRoot over a domain, but give domain boundary if no root exists
having an example f[x] will help.
Nov
10
answered Image Size using {w,h}
Nov
9
revised Problem with a Markov's Matrix
added 40 characters in body
Nov
9
answered Problem with a Markov's Matrix
Nov
9
comment Exclude data from a list
@Dr.WolfgangHintze Using the Mouse functions, such as MousePosition["Graphics"] and related. There are few demos on WRI that uses mouse to obtain coordinates from plot. reference.wolfram.com/language/ref/MousePosition.html but for this problem, one need to map the coordinates of the graphics, to the actual points in the data as well.
Nov
9
comment Exclude data from a list
yes, this can be done, but not trivial. The first stage, is to select the points using the mouse. How would a complete region be determined to have been selected? What if the users does not close the circle around? How to decide if the free hand drawn circle is closed, how about if user decided to change and clear the region, etc.. there are many use cases issues to be decided first, ie. design stage, before even thinking of the implementation. An easier way to do it, would be to use the mouse to click on 2 places, and that will make a square with these as 2 corners. This is much easier.
Nov
9
comment Manipulate Slider Value on the Plot
@Hector Your plot likes nicer with use of Inset.
Nov
9
revised Manipulate Slider Value on the Plot
added 249 characters in body
Nov
9
answered Manipulate Slider Value on the Plot
Nov
9
answered Non linear Model Fit (surface energy)
Nov
9
comment Using 0 to create new columns in a list with Part
is your method faster than using Insert? SeedRandom[0]; list = RandomInteger[100, {5, 3}]; list = Transpose@Insert[Transpose[list], list[[All, 2]], 2]
Nov
8
comment Evaluate function defined by DifferentialRoot
@Eckhard Ok. The ode you obtained from FriCAS looks ok. no singularity at x=0. This probably mean there might be a bug in Mathematica FindGeneratingFunction here. This might be a good example to send to support@wolfram.com to look at.