ggml_evaluate: Evaluate a Trained Model

In ggmlR: 'GGML' Tensor Operations for Machine Learning

Evaluate a Trained Model

Description

Evaluate a Trained Model

Usage

## S3 method for class 'ggml_functional_model'
ggml_evaluate(model, x, y, batch_size = 32L, ...)

ggml_evaluate(model, ...)

## S3 method for class 'ggml_sequential_model'
ggml_evaluate(
  model,
  x,
  y,
  batch_size = 32,
  sample_weight = NULL,
  class_weight = NULL,
  ...
)

Arguments

model	A trained ggml_sequential_model
x	Test data
y	Test labels (one-hot encoded)
batch_size	Batch size for evaluation
...	Additional arguments (ignored).
sample_weight	Numeric vector of per-sample weights (length = nrow(x)).
class_weight	Named vector of weights per class, e.g. c("0"=1, "1"=10). Cannot be used with sample_weight.

Value

Named list with loss and accuracy.

Examples

ggml_set_n_threads(1L)  # deterministic, single OpenMP pool
n <- 128
x <- matrix(runif(n * 4), nrow = n, ncol = 4)
y <- matrix(0, nrow = n, ncol = 2)
for (i in seq_len(n)) { y[i, if (sum(x[i,]) > 2) 1L else 2L] <- 1 }

model <- ggml_model_sequential() |>
  ggml_layer_dense(8, activation = "relu") |>
  ggml_layer_dense(2, activation = "softmax")
model$input_shape <- 4L
model <- ggml_compile(model, optimizer = "adam",
                      loss = "categorical_crossentropy")
model <- ggml_fit(model, x, y, epochs = 5, batch_size = 32, verbose = 0)

# Basic evaluation
result <- ggml_evaluate(model, x, y, batch_size = 32)

# With sample_weight
sw <- runif(n, 0.5, 1.5)
result <- ggml_evaluate(model, x, y, batch_size = 32, sample_weight = sw)

# With class_weight
result <- ggml_evaluate(model, x, y, batch_size = 32,
                        class_weight = c("0" = 1, "1" = 2))

ggmlR documentation built on July 14, 2026, 1:08 a.m.