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Aug
22
revised On using DiracDelta[t] in OutputResposne in version 10. Different result from version 9
edited title
Aug
22
asked On using DiracDelta[t] in OutputResposne in version 10. Different result from version 9
Aug
21
comment How to combine one or more rotated graphics objects?
Would'nt be easier to just change the order of Graphics and Rotate? Like this: e1 = Graphics[Rotate[{Blue, Opacity[.75], Disk[{0, 0}, {1/3, 1/4}]}, \[Pi]/3]]; e2 = Graphics[Rotate[{Red, Opacity[.75], Disk[{0, 0}, {1/3, 1/4}]}, \[Pi]/7]]; Show[{e1, e2}] !Mathematica graphics
Aug
14
awarded  Nice Question
Jul
23
asked 1/0 encountered when solving an ODE
Jul
23
asked Error solving third order ODE in version 10. No error in V9. DSolve`DSolveKovacicDump`
Jul
22
revised How to solve an integral equation by iteration method?
fixed the limit, had it in reverse
Jul
22
answered How to solve an integral equation by iteration method?
Jul
22
comment Is there a list of Octave functions mapped to the related Mathematica one?
there are lots of problems solved by Matlab and Mathematica side-by-side here
Jul
22
accepted How to convert \[Formal…] symbols to standard ones in an expression?
Jul
22
comment How to convert \[Formal…] symbols to standard ones in an expression?
yes. These are solutions from a set of differential equations that I am processing. So it will really include x and y as these are the same symbols used for each equation. It is just that M sometimes returns solutions using \Formal which causes problem for Latex. I am not using the solution for anything other than converting it to Latex.
Jul
22
comment How to convert \[Formal…] symbols to standard ones in an expression?
Thanks, yes, that is good. no unicode. It is not critical that x and y are being replaced by a and b. (x,y just happened to be more common to use) but will live with this solution. thank you
Jul
22
revised How to convert \[Formal…] symbols to standard ones in an expression?
added 233 characters in body
Jul
22
comment How to convert \[Formal…] symbols to standard ones in an expression?
The generated code (from TeXForm) still contain those trouble invalid code) which are the \unicode. When I do TeXForm[%] on the result from your code, it still shows up with invlaid latex code that uses \unicode. The main reason I wanted to remove those \Formal and replace them with normal symbols is to avoid this unicode being generated. I'll update the question to make it more clear. You have removed all the other unicode, good, but one is still there. !Mathematica graphics
Jul
22
asked How to convert \[Formal…] symbols to standard ones in an expression?
Jul
22
comment HoldForm doesn't hold form
comparing the difference in ??Plot between V9 and V10, I noticed only difference is PlotTheme:> was added to V10. I do not know if this has anything to do with this change of behavior or not. This change might break existing code which used HoldForm in labels.
Jul
20
comment How to enter chemical equations?
I would use Latex. tex.stackexchange.com/questions/142865/… . Use the right tool for the right job.
Jul
20
comment How to make Mathematica save all open files, or automatically ask to save each file when closing
I just found out, this is not the behavior I wanted at all. This has caused me problems. There are times I make a change to the notebook, but then decide I do not want the cnahges, and close the notebook without saving by clicking on "X" corner of the window. It turns out Mathematica now still saves the changes I made ! as it never asks me if I want to save it first as it used to before. This is not what I wanted. I wanted it to ask me if I want to save the changes. So I have rolled out this option back to the way it was. AutoSave is not what I want actually.
Jul
20
comment How to make use of Associations?
Is there any advantage to doing AppendTo[pinfoIm, "lastName" -> "Brezhnev"] vs. pinfoIm["lastName"] = "Brezhnev"? thanks.
Jul
20
comment Invert 3D objects (shape) to 3D patterns objects (shape)?
what exactly do you mean by negative model ? and what is the pattern object?