4.45.3 Can you answer these questions?

4.45.3.1 Convergent infinite sum fails to converge in Sum[...]

https://mathematica.stackexchange.com/questions/160280/convergent-infinite-sum-fails-to-converge-in-sum

 
It looks like this. 
 
Limit[Sum[1/((2 n + 1) Pi I - x), {n, -m, m}], m -> ] 
= -(1/2) Tanh[x/2] 
 
Sum[1/((2 n + 1) Pi I - x), {n, -, }] 
Sum::div: Sum does not converge. 
 
 
Turning on Regularization  ...
 

- asked by huotuichang 1vote

4.45.3.2 Stacked BarChart with Callout

https://mathematica.stackexchange.com/questions/159945/stacked-barchart-with-callout

 
BarChart examples include this code : 
 
BarChart[Table[Callout[RandomReal[{0, 1}], Unique["text"]], 2, 8], 
BarSpacing -> 2, ChartLayout -> "Stacked"] 
 
 
Its result should be : 
 
 
 
But I can't  ...
 

- asked by qwerty 2votes

4.45.3.3 Possible to add a Heading for the columns in HDF5 format?

https://mathematica.stackexchange.com/questions/159978/possible-to-add-a-heading-for-the-columns-in-hdf5-format

 
A similar post was found here, but it's not using MMA. 
 
A small test to export HDF5 file, 
 
Export["test.h5", { "summary_Shoe" -> anssummary, "summary_Tie" -> anssummaryTie}] 
 
 
Woks fine. 
 
 
 
But  ...
 

- asked by Chen Stats Yu 3votes

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