>If you imagine yourself in the position of someone who is a newcomer >starting to use and learn about VPP. Perhaps someone with an >engineering background who has an understanding of the "vector" concept >from linear algebra courses and so on.
Speaking as someone who knows very little about the code, but I do know that vectors in C++ are not the same as vectors in linear algebra. Linear algebra vectors are more like a valarray in C++, although I understand that the valarray is designed for high performance floating point, so there is not a direct match to linear algebra vectors. A vector in VPP's infrastructure is analogous to a vector in C++. I assume the original VPP designer was more comfortable writing high performance code in C rather than C++, so he wrote his own library in C. Also, I think years ago I looked at the header file in VPP that defines vectors, and for about 20 minutes I wondered why they were not like linear algebra vectors. Luckily I had a C++ textbook nearby and opened it up and said "oh, now I understand." I hope that answers part of your concern, Elias, although like I say, I have not studied much of the code, so I imagine there are more questions you would like answers for. Burt
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