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Mar
24
comment Deleting one of each chosen elements in a list containing duplicates
@kguler Ha! I forgot to check the docs on DeleteCases itself.
Mar
24
comment Wrong fit with FindFit
You might want to point out what the OP was doing wrong, specifically the lack of use of the x-data such that mathematica was assuming x values...
Mar
24
comment Wrong fit with FindFit
I'm guessing the answer is correct. YOu're not including x-values in your FindFit, so MMA assumes integers...
Mar
24
answered Deleting one of each chosen elements in a list containing duplicates
Mar
24
comment Deleting one of each chosen elements in a list containing duplicates
For your little question, Flatten[{r,add}], or AppendTo[r,add] or Join[r,add] I think should all work...
Mar
24
answered Multidimensional Numeric Integration
Mar
24
comment selection based on values of other list
Oops, knew I forgot something, thanks @LLlAMnYP
Mar
24
comment How to find out where an error occurs?
See also: traceView : mathematica.stackexchange.com/questions/29339/…
Mar
24
comment selection based on values of other list
Select[list1, MemberQ[list2,#[[1]]]] my brackets or ordering might be wrong...
Mar
23
comment Delete data were y = “NS” in a list with elements {x, y}
See possible duplicates: mathematica.stackexchange.com/questions/2486/…, mathematica.stackexchange.com/questions/16676/…
Mar
23
answered Filter list based on date
Mar
23
answered Delete rows based on specific periods
Mar
23
comment Two identical expressions for ODE, two distinct result
Yes, see for example this tutorial (reference.wolfram.com/mathematica/tutorial/…) or this answer (mathematica.stackexchange.com/questions/42396/…) or this (reference.wolfram.com/language/tutorial/…)
Mar
18
comment Two identical expressions for ODE, two distinct result
Short answer: they're not distinct. You can show that they are in fact the same by replacing MMA's use of imaginary numbers and carrying through the negative. One is simply a numerical approximation (and hence probably uses different MMA algorithms) and one is exact.
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