sig_out_per_node()

[avciyasar]

Hello everyone;
I want to show stress some quad elements. sig_out_per_node() takes account all elements. But I want to take just some elements.
For example:
In opsvis web site, there is an example "Plot stress distribution of a plane stress quad model" . There are 25 node and 16 element in this example. sxx, syy or sxy values are seen in figures for all 16 elements. But I want to just upper two rows, the most critical elements (elements:3,7,11,15; 4,8,12,16 )

Can I do this like bellow?
ele_tags=[3,7,11,15, 4,8,12,16]
sig_out_per_node(ele_tags )

Thanks for your atentions.