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Jan
7
comment Forcing Mathematica to recognize a symbol without defining it
how about chrom = Unevaluated[chrom] now it is not blue anymore next time it is typed. and no value is associated with it either.
Jan
5
revised Zooming the interval arround $0.333\cdots $, whats wrong?
deleted 32 characters in body
Jan
5
answered Zooming the interval arround $0.333\cdots $, whats wrong?
Jan
5
awarded  Nice Answer
Jan
4
comment Delete False values from a list
In Mathematica, before starting to implement something, I find it best to first search to see if there is a command that might do what I want. Mathematica search is very good. If you type ?*Delete* for example, it will show you all commands with the word Delete in it. Then you could spot from the list, the ones that might do what you want and examine them more. This way, you would have found the DeleteCases easily yourself. screen shot !Mathematica graphics
Jan
4
comment Expected sum of largest 3
I am not good in probability at all. But isn't expectation a linear operation? So E[a+b+c]=E[a]+E[b]+E[c], and since E[*]=1/2 since it is Uniform{0,1}, and no drawing was biased in any way, then the result is 1.5, why would it be 1.8 as you say?
Jan
4
accepted how to show or find full path of file listed in the File->Open dialog?
Jan
4
comment how to show or find full path of file listed in the File->Open dialog?
Nice. I tried it. Yes, much easier that way. Will use this from now on. I have many files with same name that I open all the time, and this helps allot. thanks.
Jan
4
comment how to show or find full path of file listed in the File->Open dialog?
I see. So you mean I'd copy the file name from the Cases output, and paste into a NotebokOpen command? Ok. Will try that. Sure, a palette based method would be great and much easier to use, if possible. It would be useful for many others I assume. I hope this feature is added to V 10. But no problem if it is too much trouble. I'll try the copy/paste method for now. thanks.
Jan
4
comment how to show or find full path of file listed in the File->Open dialog?
Thanks. But how do I use the output of the above? THe above just gives me a list of the file names with fullpath/ But what is next? I need to open a notebook. I am not familar with notebook commands. I just use the File->Open to open files.
Jan
4
asked how to show or find full path of file listed in the File->Open dialog?
Jan
4
comment How to change color in the plot for a given table expression?
Why would you write H[t_] = {{0, 1}, {1, 1}}; ? what is t doing here?
Jan
3
comment How to plot several functions without jumping? (multiple eigenvalues of a system as functions of 2 parameters)
do you have an actual example?
Jan
3
revised 2D ListPlot with separate color function
deleted 7 characters in body
Jan
3
answered 2D ListPlot with separate color function
Jan
3
comment 2D ListPlot with separate color function
So you only want to plot the {x,y} part of the list? and use the z component for coloring of the point? I miss-understood.
Jan
3
comment 2D ListPlot with separate color function
yes, use the ColorFunction see ref/ListPlot3D under Color by scaled x, y, and z values. there is example there to do this.
Jan
2
answered How to convert the expression '{a->a0, b->b0}' to the expression 'a=a0; b=b0'?
Jan
1
revised Triple fractional part-related integral
added 126 characters in body
Jan
1
answered Triple fractional part-related integral