Sjoerd C. de Vries
Reputation
48,736
109/100 score
 10h comment Good way to create a similarity / distance matrix for a large dataset @AntonAntonov but DistanceMatrix is orders of magnitude faster than Outer for normal matrices. 1d comment Getting DSolve to return different solutions Looks like this should be listen with the bugs tag (introduced in 10.0, solved in 10.3?), not closed. Apr 20 comment Ordering of Eigensystem in symbolic computations Related or duplicates: 6420, 59172 Apr 20 comment How to determine distance of periodic features in measured dataset In your question you seemed to suggest that the cross was just an example of something to look for: "there are some periodic features (in this case a cross)". That was what I was referring to when I wrote "defining the feature". I wasn't referring to a characteristic of this feature (such as center or bounding box). Apr 20 comment rename files randomly @Wally To be sure: I'm not downvoting this. Note that this site is not about us doing your work, but more about us helping you get around problems and questions you encounter. Some effort from your side is appreciated. Apr 20 comment How to determine distance of periodic features in measured dataset @kay Well, at least you need to define what makes up a feature, otherwise this problem seems underdetermined. Apr 20 comment rename files randomly @YvesKlett That too, indeed, and IntegerString or ToString. Apr 20 comment What is the good source to study advanced custom coding in Mathematica Apr 20 comment rename files randomly You'd need RenameFile, and a bit of FileNames, FileExtension,FileBaseName, and FileNameSplit. Read the documentation on these functions, play with them, and come back if you encounter problems. Mar 30 comment Step by step solution for x 2a^2-5ab-ax+2b^2-bx-x^2 = 0 Mathematica doesn't provide step by step solutions. Have a look at wolfram|Alpha instead. Mar 29 comment Plots of United States states with non-standard labels As to your second question: I suppose Inset would be a good candidate. Mar 29 comment How to plot a given function over its domain The curly braces are not necessary here. Mar 28 comment How can I compute and plot the 95% confidence bands for a fitted logistic regression model? @Sektor That's a bit harsh, isn't it? I quite often see partial workarounds as answers. Besides, this answer/comment, with its graphics and code, wouldn't fit in a comment anyway. Mar 27 comment How to Set the Ratio of Units of the Axes in a 2D Plot? @H.R. I removed my comments. For 3D: BoxRatios Mar 27 comment NonlinearModelFit for analytical data is giving errors It might also be better not to assign data to variables which you are also going to use as formal variables. Mar 25 comment What is the most efficient way to replace items in a list at periodic intervals? @march was about to write that... Mar 23 comment Create a 3D face from the Shroud of Turin @vito they probably had a better picture than the one you provided. Mar 22 comment How to evaluate BSplineFunction No, the knots can not be just any sequence with the right length. It must fulfill specific conditions. Try for instance knots = {0, 0, 0, 0, .5, 1, 1, 1, 1}; Mar 22 comment Strange Error with Initialization within Animate @User18 It should be noted that SaveDefinitions can be dangerous: 6579644, 31998, 39631. Mar 20 comment Closed form probability random walk will hit k >=1 times in n steps Indeed, I don't think my solution is correct, but I think your recursion equation is not correct either. Your c[n,k] is the probability to end up at +k after n steps, not the probability of having visited +k at least once.