如何从提升多阵列中获取最大/最小元素

Question

I'm wondering a simple way to find the maximum/minimum element of a boost multiarray, an object of 3 indices as the following:

int iDepth=10,iWidth=10,iHeight=10;
boost::multi_array<GLfloat, 3> image(boost::extents[iDepth][iWidth][iHeight]);

Answer 1

这应该工作：

std::max_element( image.origin(), image.origin() + image.num_elements());

Answer 2

Using member data() is more correct because:

1. ensures that image is actually a contiguous (compact array).
2. scans from the beginning of the array, even if the first elements is not [0][0]... . ( origin() means the address of [0][0]... even if the array "starts" at a different point, eg [1][1]... .

std::max_element( image.data(), image.data() + image.num_elements());

Answer 3

你尝试过这样的事情：

std::max_element( image.begin(), image.end());