Ch4: split single signal, multi signal, and real data examples

[jni]

• [x] Add explanation, including code showing single pencil beam, of how pencil beam scanning gives rise to 3D dataset at the end of the chapter.
• [ ] Split single signal, multi-signal, and real data examples, producing the combined figure only at the very end. A gentler introduction in steps would be much better.
• [x] Pull out comments in code into separate text cells.
• [x] Various other smaller comments in attached pdf
• [x] From @hdashnow: Define azimuth.

elegant-scipy-ch4.pdf

[jni]

@stefanv Some of these are easier than others, but I've added the easy tag for the ones that are quite immediate, eg. pulling the code comments out.

[stefanv]

OK, OK, I get the idea with the urgent, important, AND easy tags ;)

[stefanv]

Good comments, thank you @jni. Except I'm not sure why your PEP8 checker is flaring up at the point indicated?

[jni]

@stefanv I purposefully omitted another potentially-useful tag: "mostly boring busywork". =P But it does have to be done!

I'm not sure what PEP8 is doing but it's whatever's built into the notebook. Ignore it for now!

[hdashnow]

@stefanv can we tick some of this stuff off? @jni does whatever remains still warrant urgent status?

[hdashnow]

Another suggestion: Define azimuth when it first appears (I didn't figure out what it was until the figure, which is a great figure BTW)

[jni]

which is a great figure BTW

I agree! 👏 👏 👏

[jni]

does whatever remains still warrant urgent status?

This is a good question. Probably not! Removing! (But it does warrant easy and important... =) I also think either one of us could do it at this point, which says a lot about the state of the chapter. =D

[stefanv]

@jni OK to punt on the last remaining point, or to move that to a 2nd ed. fix?

[jni]

@stefanv yes, I'll change the tag and title.