topic Re: Want to know what "<<" means in JSL in Discussions

Want to know what "<<" means in JSL

timothy_forsyth — Tue, 25 Mar 2025 20:44:11 GMT

Hi,

What does "<<" signify in JMP scripts? I'm using JMP 17

 // Get the rows associated with the current excursion label
    excursion_rows = dt << Get Rows Where(dt:"Excursion Label"n == excursionLabels[i]);

Re: Want to know what "<<" means in JSL

hogi — Tue, 25 Mar 2025 20:57:13 GMT

it's a message which is sent to an object.

dt is a variable which represents a data table.

The message "get rows where" is sent to this object.

The return value [matrix of rows] is stored in the variable excursion_rows.

Re: Want to know what "<<" means in JSL

timothy_forsyth — Tue, 25 Mar 2025 22:13:05 GMT

Thanks so much!

Re: Want to know what "<<" means in JSL

jthi — Wed, 26 Mar 2025 09:35:26 GMT

Scripting Guide is content to quickly go through (no need to read everything, but take a look what it contains), Scripting Guide > Introduction to Writing JSL Scripts > JSL Terminology .

Edit:

<< is same as Send()

Names Default To Here(1);
dt = Open("$SAMPLE_DATA/Big Class.jmp");
biv1 = dt << Bivariate(Y(:weight), X(:height));
biv1 << Fit line;

biv2 = Send(dt, Bivariate(Y(:weight), X(:height)));
Send(biv2, Fit Line);