2.33.3 Can you answer these questions?

Can you answer these?

2.33.3.1 Drawing "pins" of a certain length in a pgfplots

http://tex.stackexchange.com/questions/326797/drawing-pins-of-a-certain-length-in-a-pgfplots

I have plot of y = 2 log_{2}(x), or equivalently, a plot of y = (2/ln(2))ln(x), a tangent line at (4,4), and a secant line through (4,4) and (16,8).  I draw two "pins" to label these lines.  The  ...
 

- asked by user74973 3votes

2.33.3.2 How can I add thickness to a 3D surface plot?

http://tex.stackexchange.com/questions/327393/how-can-i-add-thickness-to-a-3d-surface-plot

I'd like to apply thickness to my plot, similarly to what's shown in the image on the right. 
\documentclass[border=5mm]{standalone} 
\usepackage{pgfplots} 
\pgfplotsset{compat=1.13} 
...
                                                                                  

                                                                                  
 

- asked by sayros 5votes

2.33.3.3 Visualize volume of revolution between two graphs with pgfplots

http://tex.stackexchange.com/questions/327067/visualize-volume-of-revolution-between-two-graphs-with-pgfplots

I am trying to visualize the volume generated by rotating two graphs around the xaxis. For example for the functions f(x) = x^3 + 1 and g(x) = x + 1 (over the interval [0,1]). Here is what I tried so  ...
 

- asked by Julia 2votes

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