Assign values to selected rows

[#1]

Hi,

I want to assign a value in a column for a set of rows selected.

I select the rows like this:

dt=current data tables();
dt << selectwhere(dt:columnA == "1" );

And I would like to assign the value "TEST" to the columnC for all the selected rows (only for the selected rows).

How can I do it very simply (i.e. without for loop)?

Thanks in advance.

[#2 · Accepted solution]

It might be better to use '<<getRowsWhere()':

NamesDefaultToHere(1);
dt = Open("$SAMPLE_DATA/Big Class.jmp");
Wait(3);
r = dt << getRowsWhere(:height < 55);
Column(dt, "weight")[r] = .;

And for JMP 13, see also:

https://community.jmp.com/t5/Uncharted/Data-table-subscripting/ba-p/21013

[#3]

Excellent !

Thank  you.