Yves Klett
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 Apr 22 comment Normalize Elements of lists Normalize /@ list or #/Norm[#] & /@ list ? Welcome to the beautiful world of Map! Apr 21 comment Problem regarding plot Please add more information and code, otherwise helping is very difficult, and the question will be closed. Apr 21 comment Scaling the axis You try to scale the iterator - that doesn't work. Scale the function argument instead... Apr 21 comment Make the moon's 3D gif So that's the fabled danish moon, eh! Apr 21 comment Replacement rule of pure function not working Happens to me all of the time ðŸ˜‰ Apr 21 comment Replacement rule of pure function not working Does this do what you want: Thread[xxx[{1, 3, 4}, {10, 20, 30}]] /. xxx -> (#1^2 + #2 &)? Just a slight case of parenthesia... Apr 21 comment Numerical derivative from data points Are you aware of Interpolation? Possible duplicate of mathematica.stackexchange.com/q/14023/131 and/or mathematica.stackexchange.com/q/10986/131 (amongst others). Apr 21 comment Make the moon's 3D gif It would be useful to state all your requirements / gripes with your solution in the question. Apr 21 comment Make the moon's 3D gif What is the "but.."? Are you after the animation part? Apr 21 comment RegionPlot3D with Resolve: error: “…must be a Boolean function” @Kuba why not answer anyway? The question title is quite clear and much simpler to find than the pitfalls thread. Personally, I'd not vote to close. Apr 21 comment Solving pure functions Please don´t use // (Postfix) for comments. This is used for postfix notation. Use (* ... *) instead. Apr 21 reviewed Close Export pdf, imagesize changed Apr 21 reviewed Close Problem when extracting value from another function Apr 21 reviewed Close the outer totalistic rule Apr 21 reviewed Close Extract values from user-made procedures Apr 21 comment Extract values from user-made procedures Wraakvol, a belated welcome! Hope you will enjoy your stay ;-). Glad that you managed to solve your problem. This question may be closed, but that is nothing personal and should not discourage you to post new questions. Apr 21 reviewed Approve FindRoot does not find any roots of a black box function Apr 20 comment Extract values from user-made procedures Have you tried breaking down the problem? Someone may feel like reverse-engineering / debugging your code, but your chances are better the the more you reduce the overhead. Apr 20 comment rename files randomly @Sjoerd let's not forget RandomInteger ðŸ˜‰ Apr 20 reviewed Reviewed How should I solve this system of equasions?