Simple Matrix Creation Question

pmroz

I have some code where I need to pass a matrix with one value to highlight one row in a table box:

nw = new window("test",
	tb = table box(
		string col box("Col1", {"aa", "bb", "cc"}),
		number col box("Col2", [1, 2, 3])
	)
);
rm = [2];
tb << set selected rows(rm);

The row number to be highlighted is a variable.  I would like to use the simplest syntax to create the row number matrix using this variable.  These methods don't work:

a = 2;		// Need a matrix holding this variable value
b = [a];	// Doesn't work
c = [expr(a)];	// No
d = [eval(a)];	// No
e = [eval(expr(a))];	// No

These are the methods I came up with that do work:

// Works but so complicated...
f = eval(parse(evalinsert("[^a^]")));	// Yes

// Works too
g = [1];
g[1] = a;	// Yes

Is there a simpler one-liner that I'm missing?  I just want to create a matrix like [2] dynamically.

Jeff_Perkinson

I think the Matrix() function will do what you're looking for:

 

//:*/
a=2;
b=matrix(a);
/*:

[2]

In your original example:

 

a = 2;
nw = New Window( "test",
	tb = Table Box(
		String Col Box( "Col1", {"aa", "bb", "cc"} ),
		Number Col Box( "Col2", [1, 2, 3] )
	)
);
rm = Matrix( a );
tb << set selected rows( rm );