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Oct
26
comment OpenCL_result not the same as that in the example-Julia
I don't think it is a zoom problem as the DataRange is defined to be {{-2.0, 2.0}, {-2.0, 2.0}}. It works fine for me on a Mac in 10.0.0.1. Have you copied the example code into a notebook and started from a fresh kernel?
Aug
30
awarded  Good Answer
Jul
29
comment PlotMarkers problem in ErrorListPlot, Mathematica 10
This works on OSX 10.9.4 when you add Joined -> True. Without it I see the same behaviour you are experiencing.
Jul
16
comment Is there a bug in AssociatePairs?
I'm getting the same on OSX 10.9.4
Jul
14
answered Findfit doesn't give the good fit; Changing the starting values will not change the results
Jun
28
comment How to solve this nonlinear 2 by 2 equations?
'Log" is the natural logarithm and your function 'ln' is not defined unless you have defined it somewhere else in the notebook. @belisarius wants to show you the regions these two equation are covering giving you a suggestion where the solution, if any, might lie.
Jun
15
awarded  Talkative
May
15
answered How to assign special colors to the output of DensityPlot?
Mar
28
comment Understanding execution time in nested loops
Don't use AppendTo, it is very very slow use Sow and Reap. And yes as @Kuba hinted at don't use For loops.
Feb
28
awarded  Popular Question
Feb
27
awarded  Enlightened
Feb
27
awarded  Nice Answer
Feb
2
awarded  Yearling
Jan
2
comment Any other way to get a better FindFit for my data besides good initial parameters?
Your constraints make no sense. If kd and kd' are positive then deltaa'' must be negative as you have data points with negative slope.
Dec
31
comment Plot draws list of curves in same color when not using Evaluate
It means that Plot isn't seeing the argument as a list. A list is treated as one argument not many arguments as Plot has HoldAll attribute .
Dec
22
revised AccountingForm w/o significant figures
added 30 characters in body
Dec
22
answered AccountingForm w/o significant figures
Dec
16
comment NMinimize stops with no more memory?
Use the EvaluationMonitor option to print the parameters f is called with and when Nminimize got stuck use the same parameters to see what your functions returns. I have no access to Mathematica right now and can help therefore only by giving you suggestions. You should update your code in the Question to the latest version you are using. I totally forgot to mention you have to define the parameters to f as follows: f[a1_?NumericQ, ... to make sure NMinimize is calling your code only with numeric values! I guess that's it! Man am I slow today to see that.
Dec
16
comment NMinimize stops with no more memory?
Have you tried to solve this for Reals instead of Integers to see if it solves at all?
Dec
16
comment NMinimize stops with no more memory?
Looking at your code I see a few things I suggest you should change to clean it up. You should not define symbols that start with capital letters as those might shadow Mathematica defined sybolm. Don't have function definitions in your Module as you are defining them over and over again when NMinimize calls your function possibly thausends of times. You'll also get printed everytime the DateStringwhich slows down the code and do you really need to know every time NMinimize call your function what time is was? You have twice the statement If[k==1, in your code up top is that correct?