How to input matrix in python

Take Matrix input from user in Python

In this tutorial, we are going to learn how to take matric input in Python from the user. We can take input from the user in two different ways. Let’s see two of them.

Method 1

Taking all numbers of the matric one by one from the user. See the code below.

Example

# initializing an empty matrix matrix = [] # taking 2x2 matrix from the user for i in range(2): # empty row row = [] for j in range(2): # asking the user to input the number # converts the input to int as the default one is string element = int(input()) # appending the element to the 'row' row.append(element) # appending the 'row' to the 'matrix' matrix.append(row) # printing the matrix print(matrix)

Output

If you run the above code, then you will get the following result.

Matrix 2

Taking one row at a time with space-separated values. And converting each of them to using map and int function. See the code.

Example

# initializing an empty matrix matrix = [] # taking 2x2 matrix from the user for i in range(2): # taking row input from the user row = list(map(int, input().split())) # appending the 'row' to the 'matrix' matrix.append(row) # printing the matrix print(matrix)

Output

If you run the above code, then you will get the following result.

Conclusion

If you have queries in the tutorial, mention them in the comment section.

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input matrix in python

The data elements in a matrix can be accessed by using the indexes. The access methos is same as the way data is accessed in Two dimensional array.

How do you make a 3×3 matrix in python?

5 Answers. You can use numpy. First, convert your list into numpy array. Then, take an element and reshape it to 3×3 matrix.

How do you input a matrix into one line in Python?

1. # A basic code for matrix input from user.
2. R = int(input(«Enter the number of rows:»))
3. C = int(input(«Enter the number of columns:»))
4. # Initialize matrix.
5. matrix = []
6. print(«Enter the entries rowwise:»)

How do you do matrix multiplication in Python?

Multiplication of two matrices is possible only when number of columns in first matrix equals number of rows in second matrix. Multiplication can be done using nested loops. Following program has two matrices x and y each with 3 rows and 3 columns.

What is matrix in python?

A Python matrix is a specialized two-dimensional rectangular array of data stored in rows and columns. The data in a matrix can be numbers, strings, expressions, symbols, etc. Matrix is one of the important data structures that can be used in mathematical and scientific calculations.

What is a 2D array in Python?

Two dimensional array is an array within an array. It is an array of arrays. In this type of array the position of an data element is referred by two indices instead of one. So it represents a table with rows an dcolumns of data.

How do you make a 2D list?

To construct a 2D list, we can use append() or an initializer. First example. We create an empty list and add empty lists to it with append(). We can construct any rectangular (or jagged) list this way.

How do you create a matrix?

1. Define your purpose. .
2. Recruit your team. .
3. Identify and collect the data sets. .
4. Select the appropriate matrix type. .
5. Determine how to compare your data. .
6. Document the matrix relationships. .
7. Review and draw conclusions.

How do you create a zero matrix in python?

1. Shape: is the shape of the numpy zero array.
2. Dtype: is the datatype in numpy zeros. It is optional. The default value is float64.
3. Order: Default is C which is an essential row style for numpy. zeros() in Python.

What is a matrix data structure?

A matrix is a two-dimensional data structure and all of its elements are of the same type. A data frame is two-dimensional and different columns may contain different data types, though all values within a column must be of the same data type and all columns must have the same length.

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