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| Dataset is new to me as well. I was a little surprised that DateListPlot was happy to ingest Dataset of GroupBy. My back up plan was to GatherBy the country. b = {#[[All, 2 ;; -1]], #[[1, 1]]} & /@ GatherBy[Normal[Values[a]], First] ... |
| filteredSubClass = Keys@DeleteMissing[ EntityClass["MinorPlanet", "DwarfPlanet"]["Radius", "EntityAssociation"] ]; EntityValue[filteredSubClass, {"Entity", "Radius", "OrbitPeriod"}] In this example filteredSubClass... |
| Cities in the Southern Hemisphere similar to Chicago average monthly temperature, seasonally adjusted, over a ten year history: shp = Take[Select[rankedAll, CountryData[CityData[#, "Country"], "SouthernHemisphere"] &], 10] {Entity["City",... |
| Don't feel bad. There are plenty of infix symbol shortcuts in common use in Wolfram Language. Many of whom the full function names are not well known or used much at all. sym:patt is Pattern patt1_?patt2 is PatternTest expr1;expr2 is... |
| Related article in Nature today, http://www.nature.com/news/ebola-by-the-numbers-the-size-spread-and-cost-of-an-outbreak-1.16144 ![Global Reach][1] [1]: /c/portal/getImageAttachment?filename=ebola-graphic-spread-B.jpg&userId=27262 |
| An alternative would be to clear rmsd first, on every pass. A shortcut for Clear is Set to dot like this =. Table[rmsd =.; khi = 64; ro2 = 3400; kmrs = 4; kisu = 1.5; kmp = 0.5; |
| If date[[i, 6]] == 1 is True, then it will trigger solarcalc[[1, 2]] += solardata[[i, 3]] every time, for every line. That is why all position 2 are the same. Notice that for 'number of minutes' it was, date[[i, 6]] == 1 then date[[i, 6]] == 2 then... |
| Flatten to join the step column into a flat list. Map to try the BesierFunction for each new step. Export to make a new data file. extraSteps = Map[f, Flatten[step]]; Export["C:\Users\Mitja\Documents\nova\extraSteps.txt", extraSteps,... |
| Sure. FindMinimum using the starting ellipse coefficients as a search starting point with no other constraints : {res, coes} = FindMinimum[distance, {{aa, a}, {bb, b}, {cc, c}, {dd, d}, {ff, f}, {gg, g}}]; FindMinimum using the starting ellipse... |
| Once you get the data is the right shape, the next thing you will run into is this message: FindFit::fitc: Number of coordinates (1) is not equal to the number of variables (4). >> FindFit over independent variables labeled {s, w, r, c} will be... |