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Fix warnings in PCAOld.

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Relintai 2023-02-08 12:58:01 +01:00
parent c49d089791
commit d4409491d7
1 changed files with 9 additions and 4 deletions
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13
mlpp/pca/pca_old.cpp
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@ -25,23 +25,27 @@ std::vector<std::vector<real_t>> MLPPPCAOld::principalComponents() {
X_normalized = data.meanCentering(inputSet);
U_reduce.resize(svr_res.U.size());
for (int i = 0; i < k; i++) {
for (int j = 0; j < svr_res.U.size(); j++) {
for (uint32_t j = 0; j < svr_res.U.size(); j++) {
U_reduce[j].push_back(svr_res.U[j][i]);
}
}
Z = alg.matmult(alg.transpose(U_reduce), X_normalized);
return Z;
}
// Simply tells us the percentage of variance maintained.
real_t MLPPPCAOld::score() {
MLPPLinAlg alg;
std::vector<std::vector<real_t>> X_approx = alg.matmult(U_reduce, Z);
real_t num, den = 0;
for (int i = 0; i < X_normalized.size(); i++) {
real_t num = 0;
real_t den = 0;
for (uint32_t i = 0; i < X_normalized.size(); i++) {
num += alg.norm_sq(alg.subtraction(X_normalized[i], X_approx[i]));
}
num /= X_normalized.size();
for (int i = 0; i < X_normalized.size(); i++) {
for (uint32_t i = 0; i < X_normalized.size(); i++) {
den += alg.norm_sq(X_normalized[i]);
}
@ -49,6 +53,7 @@ real_t MLPPPCAOld::score() {
if (den == 0) {
den += 1e-10; // For numerical sanity as to not recieve a domain error
}
return 1 - num / den;
}