No arguments
Description:
Compute the pointwise sign of selected images.
Examples of use:
• Example #1
<a href="image.jpg" class="highslide" onclick="return hs.expand(this)">image.jpg</a> +sub {ia} sign[-1]

Command: <a href="image.jpg" class="highslide" onclick="return hs.expand(this)">image.jpg</a> +sub {ia} sign[-1]

Command: <a href="image.jpg" class="highslide" onclick="return hs.expand(this)">image.jpg</a> +sub {ia} sign[-1]
• Example #2
300,1,1,1,'cos(20*x/w+u)' +sign display_graph 400,300

Command: 300,1,1,1,'cos(20*x/w+u)' +sign display_graph 400,300

Command: 300,1,1,1,'cos(20*x/w+u)' +sign display_graph 400,300