Can validation accuracy be higher than training accuracy?

Can validation accuracy be higher than training accuracy?

The validation accuracy is greater than training accuracy. This means that the model has generalized fine. If you don’t split your training data properly, your results can result in confusion. so you either have to reevaluate your data splitting method by adding more data, or changing your performance metric.

Why is validation accuracy lower than training accuracy?

If your model’s accuracy on your testing data is lower than your training or validation accuracy, it usually indicates that there are meaningful differences between the kind of data you trained the model on and the testing data you’re providing for evaluation.

Why is my test accuracy higher than train accuracy?

Test accuracy should not be higher than train since the model is optimized for the latter. Ways in which this behavior might happen: you did not use the same source dataset for test. You should do a proper train/test split in which both of them have the same underlying distribution.

What is the difference between training accuracy and validation accuracy?

In other words, the test (or testing) accuracy often refers to the validation accuracy, that is, the accuracy you calculate on the data set you do not use for training, but you use (during the training process) for validating (or “testing”) the generalisation ability of your model or for “early stopping”.

How do you improve validation accuracy?

2 Answers

  1. Use weight regularization. It tries to keep weights low which very often leads to better generalization.
  2. Corrupt your input (e.g., randomly substitute some pixels with black or white).
  3. Expand your training set.
  4. Pre-train your layers with denoising critera.
  5. Experiment with network architecture.

Why training accuracy is low?

If the training accuracy is low, it means that you are doing underfitting (high bias). Some things that you might try (maybe in order): Increase the model capacity. Add more layers, add more neurons, play with better architectures.

How accuracy is calculated?

The accuracy formula provides accuracy as a difference of error rate from 100%. To find accuracy we first need to calculate the error rate. And the error rate is the percentage value of the difference of the observed and the actual value, divided by the actual value.

Why is my validation accuracy fluctuating?

Your validation accuracy on a binary classification problem (I assume) is “fluctuating” around 50%, that means your model is giving completely random predictions (sometimes it guesses correctly few samples more, sometimes a few samples less). Generally, your model is not better than flipping a coin.

Can a validation accuracy be higher than training accuracy?

The first one is almost close to impossible. If the second case is happening then accuracy will fall apart in testing data which is not good. However, if the accuracy (validation data) is around 80% accuracy (training data) given that data points in the validation data are somewhat challenging to the model then we can term it as a good model.

Which is better, validation data or training data?

We’re getting rather odd results, where our validation data is getting better accuracy and lower loss, than our training data. And this is consistent across different sizes of hidden layers. This is our model: And this is an example of the accuracy and losses: and .

When is validation set too small for machine learning?

If the validation set is to small it does not adequately represent the probability distribution of the data. If your training set is small there is not enough data to adequately train the model. Also your model is very basic and may not be adequate to cover the complexity of the data.

How to improve the accuracy of machine learning?

The solutions to issue are:- Probably the network is struggling to fit the training data. Hence, try a little bit bigger network. Try a different Deep Neural Network. I mean to say change the architecture a bit. Train for longer time. Try using advanced optimization algorithms.