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Mar
5
comment how to reduce noise in time series data?how to do interpolation for missing value data?
Have a look at ListInterpolation
Feb
23
comment Help with functions in Mathematica
@m_goldberg - I'm guessing ToCharacterCode? Connor, you might not need your own function for this.
Feb
21
comment Copy/export a plot as vector EMF
The Opacity trick definitely works. Your issue is not the EMF issue, it's that you can't use Export at all.
Feb
12
comment Time inhomogeneous Markov Chain in Mathematica
I haven't time to work this out myself but something involving FoldList and an Array of the relevant transition matrices should work. The main catch is that RandomFunction outputs TemporalData, so you might need to use ["Paths"] to strip it back to a plain list.
Feb
12
comment Iterating a model with 2nd order difference equations using Manipulate
jones, please don't post another version of the same question just because the prior one was closed. Edit the old question to improve it (thus fixing the reason for its closure) and click "flag" to have it reopened. As a gesture of goodwill I've reopened the previous one.
Feb
9
comment Kalman filter estimation
@Nasser - could you perhaps work this up into an answer with a couple of examples? And Luke, welcome to Mathematica.SE! I hope you find the site useful.
Jan
19
comment Updating a GUI with ComboBox using GUIKit
Dear Dennis, welcome to Mathematica.SE! It would help if you posted code showing what you have tried.
Jan
14
comment Periodogram for irregularly spaced data
@Sektor - I've pasted the data in for the UK at least.
Jan
14
comment Periodogram for irregularly spaced data
@MikeHoneychurch - unfortunately Periodogram doesn't take TemporalData in v9, and I don't think that's changed in v10.
Jan
14
comment Periodogram for irregularly spaced data
One can apply a LowpassFilter to the data before drawing the Periodogram, but given that their whole thesis is about the relative importance of other bits of the spectrum, that's a bit odd.
Jan
5
comment How to control pedestrians to enter the simulation region with random functions?
I would suggest getting the constant-probability-of-entry case working first. Also, you might have better results if you don't use subscripts. Have a look at some of the suggestions in this question.
Dec
31
comment Trying to Figure Out how to work with datasets & Classify[] and Predict[]
If you are the original poster, but just didn't fully register the first time this link might be helpful. If you merge your accounts, the rep you gained from the question will be added to that earned from the answers.
Dec
31
comment Counting the total number of instances of some collection of objects in a list
This gives the right result for the test case, but isn't it a bit convoluted compared with the built-in Alternatives function?
Dec
18
comment How to draw multi curves in a graph with errorbars
I know this isn't the crux of the question, but wouldn't the data be more simply constructed using FoldList rather than a For loop? i.e. DATA=FoldList[#1+#2&, Table[{0, Random[], Random[]}, {n}], Table[{1/n, RandomReal[{-1, 1}]/20, RandomReal[{-1, 1}]/20}, {m-1},{n}]]. At the very least, the Table construct doesn't require an explicit j iterator.
Dec
17
comment My code does not give the same results on mathematica 9 and 10
@Developer2000 - you should not assume that it was me who downvoted. In this case it was, and now that you have clarified what your question is, I am happy to do so. But please bear in mind that it is not usually considered appropriate to ask for votes to be changed. Downvoting is one of the incentives in StackExchange to ensure questions are improved. In this case, the system worked.
Dec
17
comment Incorporating the minimum and maximum of the function in a Dynamic plot
Welcome to Mathematica.SE! It isn't really appropriate for us to do your homework for you, but here are some hints that might help. You can use calculus to find turning points, and show the turning point using Epilog, like this: Dynamic[Plot[f, {x, -10, 10}, Epilog -> {Red, PointSize[Large], Point[{With[{minx = First[x /. Solve[D[f, x] == 0]]}, {minx, f /. x -> minx}]}]}]].
Dec
11
comment What are the most common pitfalls awaiting new users?
@timoftebogdan. I disagree- this is a site about Mathematica, so it is not relevant if nested loop-itis is popular in other languages. And Map is a lot more readable than For...etc
Dec
10
comment Polar histogram
What's radiis? It's not specified in your code.
Dec
10
comment How to know the internal algorithms of functions like Predict or Classify?
This is an interesting question but it's not clear anyone but Wolfram staff could answer it.
Dec
10
comment Setting Page Scale
David, just want to reassure you that there is no shame in asking a duplicate question. We mark them this way to ensure that people get pointed to a canonical answer.