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Sep
8
comment How to pick a solution from a list of solutions using a test?
solutions=x /.Solve[f[x] == 0, x]; Pick[solutions/. b3 -> 2,Min[solutions]/.b3 -> 2] gives {1}. You need to do the replacement before Pick uses them.
Sep
8
awarded  Nice Answer
Sep
8
revised How to extract data from contour plot as a text file?
added 373 characters in body
Sep
8
comment How to extract data from contour plot as a text file?
@SjoerdC.deVries if the coordinates is what is needed, I updated the answer. thank you.
Sep
8
revised How to extract data from contour plot as a text file?
added 373 characters in body
Sep
8
comment How to extract data from contour plot as a text file?
@MMM I do not follow you. Where did this 2 columns come from and what they represent? May be all what you needed then is a simple Table command. You have to be clear what is it you want as I am not really following you.
Sep
8
comment How to extract data from contour plot as a text file?
You asked for contour data. The above is the contour data. There are 11 rows. One for each contour.
Sep
8
revised How to extract data from contour plot as a text file?
cleaned
Sep
8
answered How to extract data from contour plot as a text file?
Sep
8
comment How to keep markers as dots in a joined ListPlot?
fyi, can also use the new command ListLinePlot for this. No difference for this case. ListLinePlot[data, ImageSize -> 700, PlotMarkers -> {Automatic, 12}] !Mathematica graphics
Sep
7
revised Numerical differentiation methods
added pic
Sep
7
answered Numerical differentiation methods
Sep
7
comment Manipulate graphs in 3D
If one right-clicks on the image, then a pop-up menu comes up. One option is convert to graphics. I am just not able to find what Mathematica command actually is used to do this so that one can program it in. Strange. Any one knows the actual command used by that menu to convert it to Graphics object? (I never used CompleteGraph before)
Sep
7
awarded  Nice Answer
Sep
7
comment How to make Mathematica try harder to perform symbolic comparisons?
I do not know if following will work for you or not, but myself, I like to keep everything in MachinePrecision only to be able to compare things with Matlab and Fortran when I want to. You can force all computation to be in MachinePrecision by putting this at the top of the notebook or in your init.m $MinPrecision = $MachinePrecision; $MaxPrecision = $MachinePrecision; Now your example runs with no warnings: !Mathematica graphics again, do not know if this is what you want, or this will work for what you are doing.
Sep
7
revised How can I transfer mathematical expressions between Mathematica and Maple?
clean, typos
Sep
6
comment Manipulate executes expressions multiple times
@leibs the default is Full for tracking for Manipulate. And from help on TrackedSymbols it says on this option: symbols that appear explicitly in the input expression (notice the word appear explicitly). In the example above, x and y are these. They are global variables, but appeared in the expression also, hence they were tracked automatically.
Sep
6
revised Manipulate executes expressions multiple times
added 136 characters in body
Sep
6
answered Manipulate executes expressions multiple times
Sep
6
revised How can I transfer mathematical expressions between Mathematica and Maple?
added 332 characters in body