Re: [Gretl-users] element-wise matrix operator .<
On Tue, 18 Sep 2012, artur tarassow wrote:
according to the latest changelog it should be possible to use the
element-wise matrix operator ".<"
What's new is ".<=" and ".>="; ".<" has been
around for a
while. But anyway...
I tried this using the latest cvs (Windows), but it does not
seem to work, or at least I didn't get the correct syntax. I
tried this example
matrix A = { 0.6, 1 ; -0.3 , 2 }
if A .< 1
print "Hello world"
endif
Since ".<" is an element-wise operator, the expression
A .< 1
produces a matrix result, as you see by doing
<hansl>
matrix A = { 0.6, 1 ; -0.3 , 2 }
print A
Test = A .< 1
print Test
</hansl>
Such a result cannot be coerced to a boolean value, as
required by "if". Maybe what you want is
<hansl>
matrix A = { 0.6, 1 ; -0.3 , 2 }
if A < 1
print "Hello world"
endif
</hansl>
(This will not print "Hello world" since the test is for all
elements less than 1.)
Allin Cottrell