int sammon_stress | (i, dE, d2E) |
int | i | The sample number for which the derivative has to be calculated. |
double | *dE | A vector of map_dim elements (see SAMMON-VARIABLES) in which the derivative of Sammon's stress measure w.r.t. sample i is returned. The vector starts at element 0. |
double | *d2E | A vector of the same length in which the second derivative w.r.t. sample i is returned. |
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