Function predict 

pub fn predict(model: &SvmModel, x: &[SvmNode]) -> f64

Predict the label/value for a single instance.

Convenience wrapper around predict_values that allocates the decision values buffer internally. Matches LIBSVM’s svm_predict.

use libsvm_rs::predict::predict;
use libsvm_rs::train::svm_train;
use libsvm_rs::{KernelType, SvmNode, SvmParameterBuilder, SvmProblem, SvmType};

let problem = SvmProblem {
    labels: vec![-1.0, -1.0, 1.0, 1.0],
    instances: vec![
        vec![SvmNode { index: 1, value: -2.0 }],
        vec![SvmNode { index: 1, value: -1.0 }],
        vec![SvmNode { index: 1, value: 1.0 }],
        vec![SvmNode { index: 1, value: 2.0 }],
    ],
};
let param = SvmParameterBuilder::new()
    .svm_type(SvmType::CSvc)
    .kernel_type(KernelType::Linear)
    .build()?;
let model = svm_train(&problem, &param);

assert_eq!(predict(&model, &[SvmNode { index: 1, value: 1.5 }]), 1.0);