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2d
answered Trouble using Manipulate and NDsolve for coupled ODE's
2d
comment Trouble using Manipulate and NDsolve for coupled ODE's
I should note (for clarity) that the proper syntax for Manipulate is: Manipulate[expr, 'controls'], where 'controls' can take various forms (like lists, Control[XXX], etc...). Arguments in WL are separated by commas, and the first argument to Manipulate is the expression to be manipulated. The problem in the OP was that the first argument was actually NDSolve[XXX] and not the CompoundExpression they actually wanted.
Jan
29
comment How to prevent tiny complex errors in Integrate?
Not addressing why you see this particular behavior, but if you want an exact analytic answer, you need exact inputs. 6.5 is not an exact number.
Jan
26
awarded  Yearling
Dec
31
revised List Contour Plot: Delete some contour lines, but keep the colors
closed a parenthesis
Dec
18
comment Module function corrupts string?
Unless an explicit Return is used, the value returned by For is Null.
Dec
18
comment Module function corrupts string?
it is not a hack to use proper syntax
Nov
25
comment What quantity is this “length” called?
Perhaps you really want a test for the result being a List or not? Then you might look at ListQ (undocumented tho).
Nov
13
reviewed Approve Is Mathematica 10 compatible with Mac OS X 10.10 Yosemite
Nov
11
reviewed Approve Finding the point of minimum distance between two parametric functions
Nov
11
reviewed Edit How to ask Mathematica to imitate Andy Warhol's pop-art painting?
Nov
11
revised How to ask Mathematica to imitate Andy Warhol's pop-art painting?
added two links
Nov
11
reviewed Approve How to remove a line of a matrix if not all elements are numeric?
Nov
7
comment Selection bugs make Mathematica 10 unusable
support.wolfram.com/kb/12464
Nov
5
answered Finding duplicates in a list
Oct
2
comment Replacing columns of a matrix with zeros
I suppose you could do something like this then MapAt[#*0&,list1,{All,1;;3}]
Oct
1
comment Outputting numbers symbolically
Inactivate[Table[2^n, {n, 1, 5}], Power] (I am not obsessed with Inactive I promise)
Oct
1
comment Strange style conversion indicator appeared when type “a Pre”
From reference.wolfram.com/language/ref/CodeAssistOptions.html it looks like the option is "AutoConvertEnable".
Oct
1
comment How to regress negative log?
Something like NonlinearModelFit[data, -p2 Log[p1 x],{p1,p2},x] where p1 and p2 are parameters?
Oct
1
comment Spherical parametric plot
If you have version 9+ you can use: ParametricPlot3D[Evaluate[CoordinateTransform[ "Spherical" -> "Cartesian",{2 Cos[t]+Sin[t],t,Sin[10 t]}]],{t,0,Pi/2}]