Collection of "funny" Jmp newbie questions

[#1]

good to know:

- how to do this and that in Jmp?

- where Jmp is different from other programs

- where Jmp is different from Jmp (inconsistencies)

[More Topic Containers like this]

Topic	additional info
Data Tables
Why is it not possible in Jmp: - to define a formula for a specific cell? - to select any 2 cells in a spreadsheet?	JMP is Not a Spreadsheet
Is there a tutorial how to "slice" matrices?  matrix[5::-1]	answer NB: The indexing of matrices will be improved in a future version of Jmp
why new table()?	answer
why is there no dt << n rows()?	answer
Why does add row add a row to a data table - but doesn't add the values?	answer
Why are there different column names for data imported via Open and MFI?	answer
Is there something in JMP like freeze pane in Excel?	lock Columns
Why do I need a numeric column to add a column with row numbers?
New Formula Column / Concatenate numeric values
New formula column / count strings
Graph Builder
Why do FitYbyX and GraphBuilder use different color codings?	answer
When comes (collision free) Column Switcher 2.0?	wish: Add new switcher called Role Switcher
GUI
Why is there no Select mode in the Local Data Filter - like the one from (global) Data Filter?	wish: Local Data Filter - don't disable the SELECT option
In the Join Tables Platform, what's the difference between Update main table with data from second ta...
The submenus of my Jmp installation open to the left - Where is the setting to move the submenus to t...
Why does Scripting Index/See also not list the function xyz ?	you want more items to show up in see also ? suggest them here: Scripting Index and online Help: "see also"

[#2]

Is there a tutorial how to "slice" matrices?
I just found infos like this one
https://www.jmp.com/support/help/en/16.2/?os=win&source=application#page/jmp/subscripts-2.shtml 
with some basic indexing like

mat[from::to, from2::to2]

Is indexing also possible "relative to the end" (minus sign doesn't work) or indexing with open start or end (leaving the slot empty doesn't work)?

mat[1::-1];

mat[1::];

mat[::]

edit: wish
https://community.jmp.com/t5/JMP-Wish-List/new-slicing-options-for-matrices/idi-p/559090#M2563 

[#3]

why is it

current data table()
data table("my name")

but 

new table()

(without "data") - because there is no data yet in the table?  ;)

Here it seems that "tables" and "data tables" are something similar, but this is definitely not true:
https://community.jmp.com/t5/Discussions/Collection-of-quot-funny-quot-JSL-newbie-questions/m-p/5590... 

[#4]

why are there so many messages that I can send to a data table but not

dt << n rows()

just working:

n rows (dt)

edit: wish
https://community.jmp.com/t5/JMP-Wish-List/lt-lt-n-rows-to-get-the-rows-of-a-data-table/idi-p/559101

[#5]

Why does add row add a row to a data table  - but doesn't add the values *)?

*) adding values with the same syntax  just works for Table Boxes

dt = New Table( "Untitled" );
dt << add row( {1} );

New Window( "test",
	tb = Table Box( String Col Box( "string col", {"a"} ), 
	Number Col Box( "number col", {1} ) )
);
tb << add row( {"b", 2} );

edited: wish to provide a shortcut function like add row(list of values) also for data tables
(very convenient for data collection in for loops - e.g. for debugging)
https://community.jmp.com/t5/JMP-Wish-List/easy-way-to-add-rows-amp-values-to-a-data-table/idi-p/559... 

[#6]

The message 

      Obj << Add Row( {values, .....} )

is a valid message for the Display Object, Table Box

The message

     Obj << Add Rows( ,n., ,At Start|At End|After(m)> | { list of ( column name = value ) pairs } ))

is a valid message to add rows to a data table.

Both messages allow for the adding of rows, but in different formats, since the objects are very different in functionality

[#7]

When I import a text file without header - why are the column names

and when I import the same file via "Import Multiple Files ...", they are 

?

View more...

[#8]

I assume it is because 2 different developers created the 2 different applications.

[#9]

another one:
Is there something in JMP like freeze pane in Excel?

(in JMP it just makes sense wrt. columns:

i.e. to have some index columns visible on the left, independent of the actual position in the table.)

[#10 · Accepted solution]

Lock Columns (jmp.com) might work