Updated April 20, 2023

## Introduction to TensorFlow expand_dims

TensorFlow is a popular library available as open-source and was developed by the Google team in 2012. Python is the most common language used by TensorFlow, and the user can import the library of the TensorFlow into Python and execute deep learning and artificial intelligent environment. This is the only familiar way where the program needs to be executed. First, the user has to create several nodes in which the process starts to flow in the form of a graph. The data gets saved in the tensor structure and then navigates to different nodes. The multiple options of TensorFlow expand_dims are discussed in the below article.

**TensorFlow expand_dims overviews**

TensorFlow is the basic model for artificial intelligence and deep learning neural networks. Here, expand_dims() is applied to add a dimension to the input tensor. The parameters used in TensorFlow expand_dims are input, axis, name, and return.

The input tensor is mentioned in the input area.

The index where the dimensions need to add is mentioned on the axis. For example, if the input has the value of N dimension, then the value of the axis should be in the range of [–(N+1), N].

The name of the process in the TensorFlow should be given in the name area, but it can sometimes be optional.

The expanded dimension in the Tensor is returned in the return area.

### When using TensorFlow expand_dims?

The TensorFlow expand_dims is not added or reduced in the tensor elements. But it alters the shape of the flow by extending 1 to its dimensions.

If there is any vector with ten elements, it can be considered a 10*1 matrix. The best example of expand_dims can be implied in convolution neural networks to classify grayscale images. The images in grayscale are loaded with the size of [220,200] matrix. But for TensorFlow neural networks, convolution 2 D requires the input to be in the format of [in height, width, batch, channels]. So the dimensions of in-channel are missed in the given data, and it should be considered one. So it is easy to use expand_dims to insert one or more dimensions.

The operation can be extended to TensorFlow.squeeze – It can eliminate the dimensions of 1 size. Tf.reshape has the option to give extra flexibility in restructuring the size and capacity. Tf.sparse.expand_dims() can offer the functionality to sparse tensor.

If the user is given the tensor input value, then it can add the dimension of 1 length to the index axis on dimension according to the shape of the input. The dimension of the index obeys the rules of python indexing. It is based on zero, and the negative values can be calculated backward.

The TensorFlow operation can be implied to add an external batch dimension to a single component. For broadcasting purposes, it can align the axes’ values. In addition, it can be used to insert an interior vector length axis to the scalar tensors.

```
import TensorFlow as tf ## importing the library
Z=tf.constant([1,2,3], [4,5,6]) ## initialize the values
print('z', z) ##print the input
Res=tf.expand_dims(z,1) ##result computation
print (res:, res) ## print the result
```

### How to use tensorflow expand_dims?

The best quality of TensorFlow is to make the development of the code simple and easy. The instant code availability on API saves the user from re-editing the code, which may be time-consuming. The process gets hastened in the training of a TensorFlow model. There are many chances of flaws in the program, which is reduced to 85% in implementing the TensorFlow model. The other view of TensorFlow is its scalability. The code can be composed and executed on GPU, CPU, or cluster of the many systems executed for the training environment.

The user can imply it to add one or multiple dimensions in the TensorFlow.

TensorFlow is abbreviated as tf. Now, tf.expand_dims (input, dimension, name = none).

Use, tf. reshape (input, shape of matrix = []) to get the same effect, but at times in constructing a graph, the user cannot be fed with a standard value, and the error should be included. Type error: Unicode string = output is 1. Only the binary values 0 or 1 are expected.

### TensorFlow expand_dims examples:

In this case, the user can imply expand_dims to get one dimension. In the case of composing own code, the dimension of the image is limited to two dimensions. Then we can imply the same to restore four dimensions [height, width, batch, channel] and add one more dimension. If to imply reshape, there may be chances of error.

Shape (expand_dims(d,0)) = [2,3]
Shape (expand_dims(d,1)) = [3,2]
Shape (expand_dims (d,-1)) = [3,2]
Here d2 is the tensor shape. [2, 3, 4]
Shape (expand_dims(d2,0)) = [2, 3, 4, 6]
Shape (expand_dims(d2, 2)) = [3, 2, 4, 6]
Shape (expand_dims (d2, 3)) = [3, 2, 6, 4]
Input is the d tensor

Dimension of the tensor for types int64, int32, 0-D is scalar values.

The index of the dimension is provided to extend the input shape.

**Name:** the operation is optional

**Returns:** has input type and comprises a similar input data type, and the shape of the dimension should be added in one.

```
Tf.expand_dims(
Input = null
Name = null
Axis = null
)
```

-defined as input, name, axis, dim should be set as none.

The TensorFlow enables the user to add the dimension of one to the TensorFlow on-axis.

Here d is the shape of the tensor [2]

(tf.expand_dims(d, 0)) # [3, 4]

Here if the user inserts one dimension on zero in the axis, the shape of the d is one, and the axis is zero.

If the user uses tf.shape ( tf.expand_dims (d, 1) # [2, 3]

If the user has to insert one dimension on the axis, it should be given as one.

The shape of the d should be on-axis is one.

### Conclusion

The tf.expand_dims has multiple options and can be used in artificial and deep neural networks. Hence it has a wide application and can be implied in artificial intelligence.

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