Method Read

catboost/libs/data/baseline.cpp:112–156

    }

    bool TDsvBaselineReader::Read(TObjectBaselineData* data, ui64* objectIdx) {
        TString line;

        while (true) {
            if (!Reader_->ReadLine(&line, objectIdx)) {
                return false;
            }
            if (Range_.Contains(*objectIdx)) {
                break;
            }
        }
        data->Baseline.yresize(BaselineIndexes_.size());

        ui32 baselineIdx = 0;
        ui32 columnIdx = 0;
        for (const TStringBuf token : StringSplitter(line).Split(DELIMITER_)) {
            Y_DEFER { ++columnIdx; };

            CB_ENSURE(
                columnIdx < BaselineSize_,
                "Too many columns in baseline file line " << LabeledOutput(*objectIdx)
            );

            if (baselineIdx >= BaselineIndexes_.size() || columnIdx != BaselineIndexes_[baselineIdx]) {
                continue;
            }

            CB_ENSURE(!token.empty(), "Empty token in baseline file line " << LabeledOutput(*objectIdx));

            float baseline;
            CB_ENSURE(
                TryFromString(token, baseline),
                "Failed to parse float " << LabeledOutput(token) << " in baseline file line "
                << LabeledOutput(*objectIdx)
            );
            data->Baseline[baselineIdx] = baseline;

            ++baselineIdx;
        }

        CB_ENSURE(columnIdx == BaselineSize_, "Not enough columns in baseline file line " << LabeledOutput(*objectIdx));
        *objectIdx -= Range_.Begin;

        return true;
    }

    void UpdateClassLabelsFromBaselineFile(
        const TPathWithScheme& baselineFilePath,