[gradsusr] Wind barbs cut off by frames?

[Gary,163]

Dear All,I plotted an "time-height" evolution chart of wind (and other elements) at a locaion. The chart seems well, but the wind barbs near the boundaries are been cut off by the rectangular frames. At the lowest layer, i.e. 100hPa, all the southerly wind become invisible.  I attached the picture with this e-mail FYI. How to solve this puzzle? Thanks.

Regards,
Gary
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