21,531 reputation
12973
bio website
location
age
visits member for 2 years, 9 months
seen 4 hours ago

Aug
23
comment Error when using EquationTrekker
on version 10, windows 7, it hanged. But I saw message Message text not found -- (PropertyValue[{canvas ,canvasPane ,All},Name->trekPane ]) (1) >> show up before it hanged
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
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
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
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
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?
Jul
19
comment Interactively Manipulate SparseArrays or Lists
{params[c], 0, 50} here param[c] is not a control variable. This sould be a symbol, like x, c, y, etc.. not a function.
Jul
19
comment Excluding region with `RegionDifference`
yes. I just stopped local kernel and started again. still works here.
Jul
19
comment Excluding region with `RegionDifference`
windows 7, V 10.0 : !Mathematica graphics
Jul
18
comment Why does ImportString[“1c”, “Table”] eat the letter c?
Also notice what it says in help if the format specification is not given: "attempts to determine the format of the string from its contents." the keyword is attempt. I do not think this is a good way to make functions. This is all fuzzy type programming. What does "Attempt" actually mean? How do I grade this attempt? A grade? B grade? 85% attempt? A function should be clear. It should tell exactly what is the input and what is the output.
Jul
18
comment Why does ImportString[“1c”, “Table”] eat the letter c?
This is because it is SMILES :). Try this StringFormat["123c"] !Mathematica graphics
Jul
17
comment Possible bug: SparseArray Part assignment loses default value?
on version 9, I get same thing. I think it has to do with the way you build it in first place. Compare to data = Table[1, {20}];s = SparseArray[data]; s[[All]] = 1; s // Normal and now it is ok.
Jul
16
comment Mathematica 10 Notebook Fonts Look Bad
It is because you used UpperCaseFirstLetter. These are meant to be used by Mathematica only. Try it with lowerCaseFirstLetter as in foo[] instead of Foo[], it will look much better !
Jul
16
comment ListPlot[] code for CSV file not working
I do not get it. Lets say i=2, ok? So the first column is the x-values, fine. Now the y-values you are saying come from the rows of the (i-1) column? but this is 1 in this case? But that is supposed to be the x-values for all the other columns. Are you simply trying to plot columns 2-9 against the first column?
Jul
16
comment Add contour lines to Graphics3D
what is toPoint ? not defined. You are not even using pts at all in the example above.