# Troubleshooting Neural Network Error: Non-Conformable Arguments in Neurons[[i]] %*% Weights[[i]]

If you're working with neural networks, you may encounter an error message that reads "non-conformable arguments" when trying to multiply the neurons and weights matrices. This error typically occurs when the dimensions of the two matrices don't match. In this guide, we'll explain what this error means and provide a step-by-step solution to fix it.

## What Causes the Non-Conformable Arguments Error?

The error "non-conformable arguments" occurs when trying to perform a matrix multiplication operation between two matrices of different dimensions. In the case of neural networks, this error typically occurs when the number of columns in the neurons matrix doesn't match the number of rows in the weights matrix.

For example, consider a neural network with 3 input neurons, 2 hidden neurons, and 1 output neuron. The neurons matrix would have dimensions 1x3 (1 row, 3 columns), and the weights matrix for the first layer would have dimensions 3x2 (3 rows, 2 columns). If you try to multiply these matrices using the `%*%` operator, you'll get the non-conformable arguments error.

## How to Fix the Non-Conformable Arguments Error

To fix the non-conformable arguments error, you need to ensure that the dimensions of the matrices match. In the case of neural networks, this means that the number of columns in the neurons matrix should match the number of rows in the weights matrix for each layer.

Here's a step-by-step solution to fix the non-conformable arguments error:

Check the dimensions of your neurons and weights matrices for each layer of your neural network. You can use the `dim()` function in R to check the dimensions of a matrix.

Ensure that the number of columns in the neurons matrix matches the number of rows in the weights matrix for each layer. If the dimensions don't match, you'll need to adjust the architecture of your neural network.

If you need to adjust the architecture of your neural network, you can try adding or removing neurons from each layer, or changing the number of layers in your network.

1. Once you've adjusted the architecture of your neural network, rerun your code and check if the non-conformable arguments error has been resolved.

### What does "non-conformable arguments" mean in neural networks?

The "non-conformable arguments" error in neural networks typically occurs when the dimensions of the neurons and weights matrices don't match. This means that the number of columns in the neurons matrix doesn't match the number of rows in the weights matrix for a given layer.

### How do I check the dimensions of a matrix in R?

You can use the `dim()` function in R to check the dimensions of a matrix. For example, if `m` is a matrix, you can check its dimensions using `dim(m)`.

### Can I fix the non-conformable arguments error by adjusting the bias values in my neural network?

No, adjusting the bias values in your neural network won't fix the non-conformable arguments error. This error is caused by a mismatch in the dimensions of the neurons and weights matrices.

### Can I fix the non-conformable arguments error by adjusting the activation function in my neural network?

No, adjusting the activation function in your neural network won't fix the non-conformable arguments error. This error is caused by a mismatch in the dimensions of the neurons and weights matrices.

### How can I prevent the non-conformable arguments error in my neural network?

To prevent the non-conformable arguments error in your neural network, you should ensure that the dimensions of the neurons and weights matrices match for each layer. This means that the number of columns in the neurons matrix should match the number of rows in the weights matrix for each layer.

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