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Re: new slicing options for matrices - Status changed to: Acknowledged

Hi @hogi, thank you for your suggestion! We have captured your request and will take it under consideration.

Re: new slicing options for matrices - Status changed to: InvestigatingRe: new slicing options for matrices

@hogi , this and other approaches for both slicing and masking are being explored to provide more succinct ways to manipulate matrices and lists. The challenge is to make sure we don’t paint ourselves into a corner technically or with the JSL syntax.

Re: new slicing options for matrices

Also consider negative indexing for lists (similar manner as Python for example).

Re: new slicing options for matrices - Status changed to: We like it! (in the queue)

@hogi - We have reviewed your request and think it will be a great addition to JMP. This request is in the queue of items to work on in a future release.

Re: new slicing options for matrices

: )

Re: new slicing options for matrices

An example of a painted corner: this should have produced an error from day 1:

[1 2 3,4 5 6][-2]

new slicing options for matrices

☐ cool new feature
☑ could help many users!

☐ removes a „bug“

☐ nice to have

☐ nobody needs it

 

Indexing/Slicing of Matrices just works with indices which count from the start of the matrix:

What is the JSL Matrix? 

 

counting from the back or leaving the start or end open doesn't seem to work:
Collection of "funny" Jmp newbie questions 

 

my wish:

add the missing functionality such that indexing like this is also possible:

mat[1::-1];
mat[1::];
mat[::-1];
mat[::];

mat[::, x] is already possible as mat[0,x]

 

more wishes submitted by  

 

Automation and ScriptingRe: new slicing options for matrices

@Sarah-Sylvestre , could you please add to the wish:

- return "." if the vector has less entries than the index

[1 2 3][4] = .

 

At the moment, JMP throws an error and stops:

 

The error message is quite misleading. 
Why does it say invalid subscript (must be number ...)

4 IS a number, right?

 

Re: new slicing options for matrices

@hogi Thanks for bringing this one to our attention!  We have fielded this in Technical Support (in lieu of a Wishlist Item).  In any case, your feedback is greatly appreciated. 

copying @Sarah-Sylvestre 

Re: new slicing options for matrices

I hope, other users like it as well - such that it gets implemented in a future release.
Let's see ...:)