spires_num_outputs

Return the number of output channels for the reservoir.

Signature

size_t spires_num_outputs(const spires_reservoir *r);

Parameters

Returns

size_t — The number of output channels, equal to the num_outputs field of the spires_reservoir_config used at creation time. This is the required buffer size for spires_compute_output and the width of the target matrix passed to spires_train_ridge.

Example

size_t no = spires_num_outputs(r);
double *y = malloc(no * sizeof(double));
spires_compute_output(r, y);
for (size_t k = 0; k < no; k++) {
    printf("y[%zu] = %.6f\n", k, y[k]);
}
free(y);

Notes

• Const-qualified. This function takes a const pointer and does not modify the reservoir. It is safe to call concurrently with other read-only functions.
• Immutable. The return value is fixed at creation time and never changes for the lifetime of the reservoir.

See Also

• spires_num_neurons — query the reservoir size.
• spires_num_inputs — query the input dimension.
• spires_compute_output — requires a buffer of this length.
• spires_train_ridge — target series width must equal this value.