Mathematica

Image processing with ImageCompose
Hi, Would someone please help me to find out how to use ImageCompose[] to compare the signals on two images. I would like to adjust the opacity of the top image so that the signals from bottom image also show up. If I have one image red and other green, then would the matched points should show as orange? ... 11 Oct 2009 08:13

confused about == vs === in this equality
?=== lhs===rhs yields True if the expression lhs is identical to rhs, and yields False otherwise. ?== lhs==rhs returns True if lhs and rhs are identical. But looking at this example: a = ComplexInfinity; If[a == ComplexInfinity, Print["YES"]] Expecting it would print "YES", but it does not. it just re... 14 Oct 2009 08:05

ListShadowPlot3D
Dear all, I would like to plot 3D and contour plot of a list of data together(in one plot) in Mathematica6. I know in Mathematica 5.2 with ListShadowPlot3D we could plot what i need. However,Mathematica6 does not have this command and in the help documents it has something for functions not the data list. Any s... 4 Oct 2009 06:39

How to store data files in packages
Hello, my packages uses some data files. Currently, I store them in a subdirectory "resources" below the package directory and access the data via ToFileName[{$UserBaseDirectory, "Applications", myPackage, "resources"}, myDataFileName]; I wonder if this is a portable way. I am afraid it is not, since the p... 3 Oct 2009 09:54

"Mathematica could not establish a connection to the kernel"
In my case, the problem was COMODO Defense+ Security: disabling this solved the problem (disabling the COMODO firewall and antivirus didn't help). ... 30 Sep 2009 07:54

ListVectorPlot Mathematica 7 VectorFieldPlots`ListVectorFieldPlot Mathemiatca 6
Dear all, I am trying to use: ListVectorPlot[{{{x1, y1}, {vx1, vy1}}, ...}] (* Mathematica 7.0 *) with basepoint : {x1,y1} for the vector: {vx1, vy1} I would like to have the same behaviour as with the old VectorFieldPlots` Package function ListVectorFieldPlot[{{{x1, y1}, {vx1, vy1}}, ...}] (* Mathematica... 30 Sep 2009 05:43

Background image sizing
I have a bitmap image (.bmp file) - call it pict - that I wish to use as the background for some graphics. I do this with Graphics[Table[Point[{x, 50 Sin[2 \[Pi] x/100]}], {x, 0, 100}], Prolog -> Inset[pict]] (the actual graphics is more complicated than a sine curve but never mind). Now if I just display t... 29 Sep 2009 08:31

White Noise in Simulation
I am trying to add random noise to a function inside an NDSolve function. Is there a good way to add a "noise function" in my model? ... 2 Oct 2009 08:39

Dynamic Module
Mathematica 6 The dynamic module: DynamicModule[{n = 1, p = 1}, Deploy[Style[ Panel[Grid[ Transpose[{{Style["enter n", 20], Style["enter p", 20], Style["simulated X", 20]}, {InputField[Dynamic[n], Number], InputField[Dynamic[p], Number], ... 27 Sep 2009 22:20

Tooltip used with international characters doesn't save in html
As part of a notebook that generates a timeline for composers, I have the following code: Tooltip["Leo=C5=A1 Jan=C3=A1=C4=8Dek"] In Mathematica, this has the desired effect. However, when I "Save As ..." to html, the Tooltip information gets garbled so it looks like Leo=01a Jan=EF=BF=BD=01ek when I view... 27 Sep 2009 07:59