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bio website jpl.nasa.gov
location Pasadena, CA
age 47
visits member for 2 years, 6 months
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Nov
22
comment How to insert trigonometric functions into matrices' vector components?
I'm still confused because A.x represents the matrix/vector multiplication of A and x, which in your example would result in {2 Sin[phi],4}, but it seems you want the first term replaced with Sin[2]. Is that correct?
Nov
22
comment How to insert trigonometric functions into matrices' vector components?
Does phi have a value? Are you trying to use it as an argument. Sorry, but I guess I still don't understand.
Nov
22
answered How to insert trigonometric functions into matrices' vector components?
Nov
19
comment when using FileDate----The Creation date of a file is not available on Macintosh and Unix?
I can confirm that Mathematica returns a file date creation on my Mac (OS X 10.8.5, MMA v9.0.1).
Nov
4
comment Looking for mismatches between two lists
I always forget about Unitize. Very nice.
Nov
4
revised Looking for mismatches between two lists
Added Position command, changed number of columns to 3, and added result from toy example.
Nov
4
comment Looking for mismatches between two lists
@Kuba: I don't think so, based on the example given below.
Nov
4
answered Looking for mismatches between two lists
Nov
1
revised Why cant Mathematica 9 interpret this unit?
Changed version from 9.1 to 9.0.1
Oct
27
answered DSolve to solve a system of differential equations
Aug
28
revised Running PlotLegends in Mathematica 8
Tagged as MMA v8
Aug
27
awarded  Notable Question
Aug
14
revised Insert a Quantity Unit literal in TraditionalForm
Fixed typo.
Aug
14
comment Insert a Quantity Unit literal in TraditionalForm
This may be related: mathematica.stackexchange.com/questions/15634/…
Jul
2
revised In FinancialData what is the difference between FractionalChange and Change?
Fixed a typo to make searches more reliable.
Apr
24
revised TableForm behavior change
Added version-9 tag
Apr
23
revised data visualization on a lattice grid
Corrected spelling
Apr
21
comment Sqrt — how to get negative branch?
But Solve[9==x^2,x] returns both solutions, so I don't think there's an inconsistency.
Apr
20
comment Quantity and Trig functions
I'm afraid that doesn't work, @Spawn1701D.
Apr
20
comment Quantity and Trig functions
@Spawn1701D: How would I use N?