代码搜索：Sign
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www.eeworm.com/read/38039/1098910
mnu fem_nodes_act.mnu
NODES_ACT
# remove the # sign and enter foreign help string in this line
All
Display all nodes.
# remove the # sign and enter foreign help string in this line
Boundary
Display all nodes on boundary.
www.eeworm.com/read/311722/3678154
m isign.m
function res = isign(x)
%ISIGN Interval sign, internal function for slope abs
%
%sign of interval array:
% +1 for x>=0
% -1 for x