The metric how to get values of symbol network, in terms of variable name or Symbol name? How they interact of outputs of mx.symbol.Group?

Discussion
1

How to understand their relationship? It always confused me. Because, if I change some codes in metric or output of mx.symbol.Group, loss always will be changed. Any advice will be appreciated! thank you.

2

It is not clear what you are trying to ask. Could you please provide more information on what you are trying to do along with some code snippet? Thanks!

3

thanks for your reply. My question is:

In the update function, I do not know what labels and preds include? If I want to use symbol ‘loss’ in the symbol network, how to transmit the symbol ‘loss’ to metric? And what are the functions of self.sum_metric and self.num_inst? Any advice will be appreciated. Thank you very much.

class AccMetric(mx.metric.EvalMetric):
def init(self):
…
super(AccMetric, self).init(
…

def update(self, labels, preds):
…

    self.sum_metric += (pred_label.flat == label.flat).sum()
    self.num_inst += len(pred_label.flat)