2.2.1 Top new questions this week

2.2.1.1 Change Values in Dataset under Condition

http://mathematica.stackexchange.com/questions/74165/change-values-in-dataset-under-condition

 
I have the following Dataset: 
 
ds = Dataset@*Map[AssociationThread[{"ID", "VAL1", "VAL2", "VAL3", 
"Type"} -> #] &]@ 
{{"C09", 18.5, 18.5, 18.5, "FE"}, {"C11", 21, 21, 21, "FE"}, 
{"C10",  ...
 

- asked by Lea (10 votes), answered by WReach (6 votes)

2.2.1.2 Drawing a Gradient Between Two Circular Arcs

http://mathematica.stackexchange.com/questions/73928/drawing-a-gradient-between-two-circular-arcs

 
Suppose I wanted to use Mathematica graphics primitives to create a 
gradient of colors between two circular arcs. It's easy enough to make 
an area between two circles a solid color, but what if I  ...
 

- asked by Noah Rubin (10 votes), answered by ybeltukov (11 votes)

2.2.1.3 How to search Dataset to find all keys share same Value

http://mathematica.stackexchange.com/questions/74200/how-to-search-dataset-to-find-all-keys-share-same-value

 
If I have the following Dataset 
 
ds=Dataset[{ 
<|"a" -> 1, "b" -> "x", "c" -> 6|>, 
<|"a" -> 2, "b" -> "y", "c" -> {2, 3}|>, 
<|"a" -> "x", "b" -> "z", "c"  ...
 

- asked by Algohi (8 votes), answered by Leonid Shifrin (5 votes)

2.2.1.4 Windows command line arguments, stdin and stdout

http://mathematica.stackexchange.com/questions/74032/windows-command-line-arguments-stdin-stdout

 
Is it possible to utilize all three: commandline arguments, stdin, and 
stdout all at once in script for Windows?  Unix is fairly esay, but I 
can't get the following to work with Windows. 
 
Using the  ...
 

- asked by William (8 votes), answered by WReach (7 votes)

2.2.1.5 How can I replace the Greek symbols in an expression with their plain text names?

http://mathematica.stackexchange.com/questions/74047/how-can-i-replace-the-greek-symbols-in-an-expression-with-their-plain-text-names

 
Suppose I have an expression with Greek symbols in it. How would I 
convert that expression to another expression where the Greek symbols 
have been replaces with their names in plain text? I've  ...
 

- asked by jmbejara (8 votes), answered by Mr.Wizard (11 votes)

2.2.1.6 Convert number to word

http://mathematica.stackexchange.com/questions/73717/convert-number-to-word

 
I have a big number like: 123 456 789. Now I'll to writ it like this 
 
 
123 million 456 thousand 789 
 
 
I've search on the internet but nothing found that works. 
 
How can you do that? 
Thanks.
 

- asked by Luïs (8 votes), answered by Mr.Wizard (10 votes)

2.2.1.7 Why does an inert ReplaceAll modify this Dataset?

http://mathematica.stackexchange.com/questions/73855/why-does-an-inert-replaceall-modify-this-dataset

 
I cannot see any reason for this behavior besides a bug, but I've been 
wrong before so I put it before the community: 
 
ds = Dataset[{ 
<|"ID" -> "Alpha", "v1" -> 1, "v2" -> 0|>, 
...
 

- asked by Mr.Wizard (7 votes), answered by Leonid Shifrin (7 votes)