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| I have been working with a notebook using a hierarchically structured Dataset. I am looking for the correct syntax to query the Dataset to return all records for which a lower level Key takes on a particular value. Essentially, I want a new Dataset... |
| I am trying to make use of the new association and dataset capabilities and ran into a problem constructing a hierarchical structure, as in the code below. Do any of you see what i am doing wrong? (* define an association *) as =... |
| Hello all, The code below details a behavior of ContourPlot (as well as ListContourPlot) which I find inconvenient, and don't understand. It has to do with how the color is chosen for the region of values above the last drawn contour. Does anyone... |
| Below is some code that numerically solves a 2D lossless ballistic flight. r[t] is essentially {x[t],y[t]} as a 2-vector. I try to stop integration when the projectile hits the ground as given by r[t][[2]] |
| Here is a simple differential-algebraic equation. I think that since d[t] has a delta at t=10, s[t] should step up at that point. But it steps down. eqs1 = { s'[t] == d[t] - s[t]/10, s[0] == 0, d[t] == DiracDelta[t -... |
| I am writing a notebook in which ListPlot is used to plot a list of 3 data lists. At least one of the data lists is non-empty. Any non-empty data list consists of a list of pairs. So this is a common application of plotting multiple data sets on a... |
| The function FinancialData accepts a starting date or a date range. Both are giving me intermittent failures, as seen below. When I execute the input below it gives me data perhaps 90% of the time, but for about 1 in 10, I get the error below. This... |
| Just did a spell check on a document in 10.0.1. Dialog freezes for 30 seconds then a full crash. Front end and kernel shut down by windows. On Win 7 x64 and Mathematica 10.0.1. Save your work first! |
| The documentation for DeviceWrite["GPIO" .. still seems exclusively for the 26 pin header of the B version. Has anyone successfully driven the pins of the new 40-pin B+ header from Wolfram? |
| I would like to develop scripts for execution by working first in a notebook. I tried this by save-as a WL package, but clearly, some special syntax is needed -- all my code was commented out (* *). Is there a way to do this? Is there any... |