How To Delete A Row In Matlab

Deleting A Row From A Matrix

To delete a row from a matrix, you need to use the built-in function “delete”. Here is how to use it.

Syntax

“` newMatrix = delete(matrix, row) “` Where: – newMatrix: The resulting matrix after deleting the row. – matrix: The original matrix from which you want to delete the row. – row: The index of the row you want to delete. For example, if you have a matrix named “A”, and you want to delete the second row, you can do it like this: “` A = [1 2 3; 4 5 6; 7 8 9]; newA = delete(A, 2); “` This will create a new matrix “newA” which will be the same as “A” but without the second row.

Example

Let’s say you have a matrix called “grades” which contains the following data: “` grades = [89 75 92; 78 85 91; 92 88 78]; “` If you want to delete the second row from this matrix, you can do it like this: “` newGrades = delete(grades, 2); “` The resulting matrix “newGrades” will be: “` newGrades = [89 75 92; 92 88 78]; “`

Deleting A Row From A Cell Array

To delete a row from a cell array, you can use the same “delete” function. However, the syntax is slightly different.

Syntax

“` newCellArray = delete(cellArray, row) “` Where: – newCellArray: The resulting cell array after deleting the row. – cellArray: The original cell array from which you want to delete the row. – row: The index of the row you want to delete. For example, if you have a cell array called “names” which contains the following data: “` names = {‘John’, ‘Mary’, ‘Peter’; ‘David’, ‘Sarah’, ‘Michael’}; “` If you want to delete the second row from this cell array, you can do it like this: “` newNames = delete(names, 2); “` The resulting cell array “newNames” will be: “` newNames = {‘John’, ‘Mary’, ‘Peter’}; “`

Example

Let’s say you have a cell array called “fruits” which contains the following data: “` fruits = {‘Apple’, ‘Banana’, ‘Orange’; ‘Grapes’, ‘Mango’, ‘Pineapple’}; “` If you want to delete the first row from this cell array, you can do it like this: “` newFruits = delete(fruits, 1); “` The resulting cell array “newFruits” will be: “` newFruits = {‘Grapes’, ‘Mango’, ‘Pineapple’}; “`

FAQs

Here are some frequently asked questions related to “How To Delete A Row In Matlab”.

Q. Can I delete multiple rows at once?

Yes, you can delete multiple rows at once by specifying a vector of row indices to be deleted. For example, if you want to delete the second and third rows from a matrix “A”, you can do it like this: “` newA = delete(A, [2 3]); “`

Q. What happens if I try to delete a row that does not exist?

If you try to delete a row that does not exist, Matlab will throw an error. Make sure to check the size of your matrix or cell array before deleting a row.

Q. Can I delete a row in place without creating a new matrix?

No, you cannot delete a row in place without creating a new matrix or cell array. Matlab does not provide an in-place deletion function.

Conclusion

Deleting a row in Matlab is a simple task if you know the right commands. We hope this article has helped you understand how to delete a row from a matrix or a cell array. Remember to always check the size of your matrix or cell array before deleting a row.