11,708 reputation
12672
bio website linkedin.com/pub/andy-ross/14/…
location Columbia, MO
age 32
visits member for 2 years, 7 months
seen 4 hours ago

Feb
28
awarded  Civic Duty
Feb
28
answered How to specify assumptions before evaluation?
Feb
27
comment Mathematica envelope for the bottom of a plot, a generic function
With Indeterminate or say Missing[] values I would either drop them or replace them with some sensible value if you have some reason to believe you know what that should be.
Feb
26
comment Mathematica envelope for the bottom of a plot, a generic function
See my edit. The new version should work for more general x and y data.
Feb
26
revised Mathematica envelope for the bottom of a plot, a generic function
added 793 characters in body
Feb
26
revised Mathematica envelope for the bottom of a plot, a generic function
deleted 46 characters in body
Feb
26
answered Mathematica envelope for the bottom of a plot, a generic function
Feb
26
comment Reference request for neural network programming in Mathematica
Have you checked out the Neural Networks add-on package? Its pretty expensive but there might be relevant documentation or authors who could get you started. wolfram.com/products/applications/neuralnetworks
Feb
25
comment Problem with NonlinearModelFit
Keep in mind that NonlinearModelFit is a very general function. If Origin has some dedicated function for fitting sine functions it is likely using Fourier methods like those mentioned by @Szabolcs. A general solver that doesn't take advantage of properties of the functional form is going to need good starting values.
Feb
25
comment Problem with NonlinearModelFit
Manipulating the parameters is certainly an option but especially when there are many it can be very difficult to find ones that work well simultaneously. Though it slows things down, leaving the model fitting function in does much of the grid searching work for you.
Feb
25
answered Creating overlapping histogram plots
Feb
25
answered Problem with NonlinearModelFit
Feb
24
revised Considerations when determining efficiency of Mathematica code
added 1041 characters in body
Feb
24
revised Considerations when determining efficiency of Mathematica code
added 467 characters in body
Feb
24
answered Considerations when determining efficiency of Mathematica code
Feb
23
reviewed Approve suggested edit on HITS centrality
Feb
23
comment Plotting data with exponentials
@500 it works if you replace the first two steps with the following two steps. data = Import["data1.csv"]; Followed by Export["numbers.txt", Flatten@data]. Then just proceed with the above approach.
Feb
22
awarded  Nice Answer
Feb
22
revised Pasting $\LaTeX$ into a Mathematica notebook
added 284 characters in body
Feb
22
comment Pasting $\LaTeX$ into a Mathematica notebook
I just learned that the prompt is controlled via GlobalOptions > MessageOptions > TeXPasteWarning in the Options Inspector which can be found under Edit > Preferences > Advanced. Yours may be set to False?