Currently, the smith chart plotting is good, but I need draw a dual-smith-chart. Does Origin will support this in the future version? Can I modify the smithchart.c to draw a dual-smith-chart.
May not be possible to plot such a dual smith chart by just modifying the smithchart.c file. Please send a sample image of what you mean by dual smith chart to tech@originlab.com and we can consider for next version. If you send an e-mail, please refer to this post in your message, in the subject line or at the beginning of the message.