Last week I have focused on passing matrices. I was able to copy them using first class array in Go. With the help of Ryan, we are now also able to pass a matrix using the advanced armadillo constructor and a const_cast hack. I am having a lot of difficulty passing a Gonum matrix as CGO does not allow the passing of go object that have underlying go pointers in their structure, which has resulted in a "cgo argument has Go pointer to Go pointer" panic when running the program. However, Ryan has pointed out to me that a gonum matrix holds a float64 data member. I have also started to look at how to pass the memory pointer back to Go. Thus, I will try to pass the matrix as a float64 structure this week and will look at passing back matrices from C++ to Go without having to copy memory.
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