Michael Wijaya

1,262 reputation

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bio	website	holdfirst.wordpress.com
	location	United States
	age
visits	member for	1 year, 3 months
	seen	May 17 at 19:29
stats	profile views	150

	1,262 reputation	bio	website	holdfirst.wordpress.com	visits	member for	1 year, 3 months
420 badges		location	United States		seen	May 17 at 19:29

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Mar 16	comment	How to prevent the welcome screen from showing up after I close my last notebook? (Ubuntu 11.10, MMA 8.0.4.0) @Szabolcs Could you write something down in the answers section so that I can mark this question as answered?
Mar 16	comment	How to prevent the welcome screen from showing up after I close my last notebook? (Ubuntu 11.10, MMA 8.0.4.0) It works! I have always assumed that clicking on the "x" button is equivalent to "Quit" (or Ctrl-Q) from the pull-down menu. From now on I will use the Ctrl-Q shortcut.
Mar 16	asked	How to prevent the welcome screen from showing up after I close my last notebook? (Ubuntu 11.10, MMA 8.0.4.0)
Mar 10	comment	Producing a bar chart with height and color determined by two distinct lists @Brett Thank you for the simple solution. I was working with `ChartElementFunction`, not realizing that `ChartStyle` is the option I ought to be using. I just could not get rid of the gaps between successive rectangles when I used `ChartElementFunction`.
Mar 10	awarded	Scholar
Mar 10	accepted	Producing a bar chart with height and color determined by two distinct lists
Mar 10	awarded	Student
Mar 10	asked	Producing a bar chart with height and color determined by two distinct lists
Mar 6	comment	Differential geometry add-ons for Mathematica If you are trying to do tensor calculations, you may want to look at John Lee's Ricci package. He also mentions the commercial package MathTensor on that page.
Feb 22	awarded	Critic
Feb 18	comment	Using implicit differentiation to find a line that is tangent to a curve at a point @J.M. I am amazed at how quickly you come up with such elegant codes.
Feb 18	comment	Using implicit differentiation to find a line that is tangent to a curve at a point What is a good way to take the derivative of a function so that the output is also a function? It would be nice if I could do something like `D[g,x][1,1,1]` and get the partial derivative evaluated at $(1,1,1)$. Using `ReplaceAll` just does not seem right.
Feb 18	answered	Using implicit differentiation to find a line that is tangent to a curve at a point
Feb 16	awarded	Supporter
Feb 16	awarded	Analytical
Feb 15	awarded	Nice Answer
Feb 15	comment	Using results of Reduce @rcollyer Thanks for editing my answer. I was so excited that I could finally contribute something that it did not occur to me to provide links or use the code block.
Feb 15	awarded	Teacher
Feb 15	answered	Using results of Reduce
Feb 8	comment	Obtaining the square-root of a general positive definite matrix As David pointed out, you will get a huge output. I looked at parts of the output, and it appears that the only terms which are not functions of the matrix entries look like `Root[some cubic polynomial,integer between 1 and 3]`. You can simplify that part further using Solve instead of Root.