9.21.1 Top new questions this week

9.21.1.1 Is it possible to have a plot inside a manipulate with parametric controls?
9.21.1.2 Why is `k` in the output of `Sum[Log[k]^2/k^k,  k,1,Infinity ]`?
9.21.1.3 Make PlotStyle aware of the number of curves that are plotted
9.21.1.4 How can I remove and keep the elements of this set?
9.21.1.5 Reshaping sparse arrays to have extra index
9.21.1.6 How to use plot parametric function with discrete data?
9.21.1.7 DeleteDuplicates without destroying SparseArray
9.21.1.1 Is it possible to have a plot inside a manipulate with parametric controls?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=286675

As the title suggests, I am trying to use a  Plot  inside a  Manipulate  which has its controls defined programmatically. ... 
[manipulate]
 
asked by RoberRM https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=7042 Score of 9
answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 Score of 6
9.21.1.2 Why is `k` in the output of `Sum[Log[k]^2/k^k,  k,1,Infinity ]`?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=286690

The following sum converges to a constant. It would be much better to return unevaluated than to return something incorrect. 
... 
[bugs] [summation]
 
asked by Vaclav Kotesovec https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=29655 Score of 7
answered by Roland F https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=92018 Score of 3
9.21.1.3 Make PlotStyle aware of the number of curves that are plotted

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=286579

I am afraid I'm having an xy-problem, so I will try to start by describing my context. 
I have a function that depends on two variables, one of which I call a parameter.  I want to make a plot of the ... 
[plotting] [style]
 
asked by And R https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5115 Score of 7
answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 Score of 7
9.21.1.4 How can I remove and keep the elements of this set?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=286636

I have a list 
 list = {{1, 3, 7, 1, 2, 1, 4, 7}, {6, 2, 7, 9, 4, 3, 6, 7}, {2, 8, 8, 2, 3, 2, 4, 6}, {5, 7, 7, 5, 2, 1, 2, 4}, {8, 10, 10, 8, 2, 1, 2, 4}} 
 
Consider ... 
[list-manipulation] [sets]
 
asked by John Paul Peter https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=81746 Score of 5
answered by cvgmt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72111 Score of 6
9.21.1.5 Reshaping sparse arrays to have extra index

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=286732

I have an $n \times m \times p$ array, let's call it $r$. 
I want to obtain an $n \times m \times p \times 5$ array (let's call it $q$) where $q$ is the same as $r$ except that every non-zero component ... 
[linear-algebra] [sparse-arrays]
 
asked by Facieod https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=92068 Score of 5
answered by Carl Woll https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=45431 Score of 7
9.21.1.6 How to use plot parametric function with discrete data?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=286642

You can easily create a ParametricPlot using the syntax  ParametricPlot[{fx, fy}, {t, tmin, tmax}]  when you have the functions  fx  ... 
[plotting] [functions] [parametric-functions]
 
asked by internet https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=87122 Score of 5
answered by cvgmt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72111 Score of 5
9.21.1.7 DeleteDuplicates without destroying SparseArray

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=286604

When I use  DeleteDuplicates  to delete equal rows of a sparse array, the output is not a sparse array anymore. In my application, the sparse arrays are huge but very ... 
[sparse-arrays]
 
asked by Gert https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=27889 Score of 5
answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 Score of 4