[Jprogramming] Strange segment in wire plot

[Fraser Jackson]

Can anyone tell me how to get rid of the red line in the following plot 
which is a small segment of a
much larger plot?

     gg =: 0 : 0
     0 850.823 840.919 7804.77 1301.74
850.823       0 55327.9 579.847 147.268
840.919 55327.9       0 557.103 150.447
7804.77 579.847 557.103       0 3421.03
1301.74 147.268 150.447 3421.03       0
)
     gg =: ". ] ;._2 gg
     'wire' plot gg
Fraser 

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