Inverse Matrix in Excel

Excel Inverse Matrix

An inverse matrix is defined as the reciprocal of a square matrix that is a non-singular matrix or invertible matrix (determinant is not equal to zero). It is hard to determine the inverse for a singular matrix. The inverse matrix in excel has an equal number of rows and columns to the original matrix.

One interesting thing about the inverse matrix is that by multiplying it with the original matrix, we will get the identity matrix that has all diagonal values equal to one. Inverse matrices are applied in the linear algebra in solving the equations. To determine the inverse of a matrix, different types of methods are available, including manual calculation and automated calculation. The automated calculation involves the use of Excel functionsExcel FunctionsExcel functions help the users to save time and maintain extensive worksheets. There are 100+ excel functions categorized as financial, logical, text, date and time, Lookup & Reference, Math, Statistical and Information functions.read more. Excel, the matrix inverse calculation process is simplified by applying an inbuilt function of MINVERSE in excel.

Inverse-Matrix-Excel

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How to Inverse a Matrix in Excel?

Excel MINVERSE function is helpful in returning the array or matrix inverse. The input matrix must be a square matrix with all numeric values with an equal number of columns and rows in size. The INVERSE matrix will have the same dimensions as the input matrix.

Purpose: The purpose of this function is to find out the inverse of a given array

Return value: This function returns the inverse matrix with equal dimensions

Syntax: The syntax of the MINVERSE function is

minverse function

Array: The array should consist of only either positive or negative numerical values.

The INVERSE function is used in two ways in Excel, including typing manually and inserting from the Math and Trig functions under the “Formula” tab

Uses

The inverse matrix in Excel is used for various purposes. Those include

Examples

You can download this Inverse Matrix Excel Template here – Inverse Matrix Excel Template

Example#1

Determining the inverse of a 2×2 square matrix in Excel

For this example, consider the following matrix A.

Inverse Matrix Example 1.1

Follow the below steps to create a Matrix in Excel.

  1. Enter the matrix A into the Excel sheet, as shown in the below mentioned figure.

    Inverse Matrix Example 1.2
    The range of the matrix is that B2: C3.

  2. Select the range of cells to position the inverse matrix A-1 on the same sheet.

    Inverse Matrix Example 1.3

  3. After selecting the required cells, enter the MINVERSE function formula into the formula bar. It needs to be ensured that the formula entered while the cells are still selected.

    Inverse Matrix Example 1.4

  4. Enter the range of the array or matrix, as shown in the screenshot.

    Inverse Matrix Example 1.5

  5. After entering the formula, press the ENTER key in combination with the CTRL and SHIFT key to convert the normal formula to an array formula to produce all elements of the inverse matrix at a time. The formula will be changed as {=MINVERSE (B2:C3)}

    Inverse Matrix Example 1.6

  6. The resultant inverse matrix is produced as:

    Inverse Matrix Example 1.7
    Here, one thing we can observe is that the size of the input matrix and the inverse matrix is the same as 2×2.

Example #2

Determining the inverse of a 3×3 square matrix in Excel

For this example, consider the following matrix A.

Inverse Matrix Example 2

Step 1: Enter the matrix A into the Excel sheet, as shown in the below-mentioned figure.

Inverse Matrix Example 2.1

The range of the matrix is that B2: D4.

Step 2: Select the range of cells to position the inverse matrix A-1 on the same sheet.

Inverse Matrix Example 2.2

Step 3: After selecting the required cells, enter the MINVERSE function formula into the formula bar. It needs to be ensured that the formula entered while the cells are still selected.

Inverse Matrix Example 2.3

Step 4: Enter the range of the array or matrix, as shown in the screenshot.

Inverse Matrix Example 2.4

Step 5: After entering the formula, press the ENTER key in combination with the CTRL and SHIFT key to convert the normal formula to an array formula to produce all elements of the inverse matrix at a time. The formula will be changed as {=MINVERSE (B2: D4)}

Example 2.5

Step 6: The resultant inverse matrix is produced as:

Example 2.6

Here, one thing we can observe is that the size of the input matrix and the inverse matrix is the same as 3×3.

Example#3

Determining the inverse of the Identity matrix

Consider the 2×2 identity matrix for this example.

Step 1: Enter the matrix I into the Excel sheet

Example 3.1

Step 2: Select the range of cells to position the inverse matrix I-1 on the same sheet.

Example 3.2

Step 3: After selecting the required cells, enter the MINVERSE function formula into the formula bar.

Example 3.3

Step 4: Enter the range of the array or matrix, as shown in the screenshot.

Example 3.4

Step 5: Press the ENTER key in combination with CTRL and SHIFTENTER Key In Combination With CTRL And SHIFTCtrl-Shift Enter In Excel is a shortcut command that facilitates implementing the array formula in the excel function to execute an intricate computation of the given data. Altogether it transforms a particular data into an array format in excel with multiple data values for this purpose.read more key to convert the normal formula to an array formula. The formula will be changed as {=MINVERSE (B2:C3)}

Example 3.5

Step 6: The resultant inverse matrix is produced as:

Example 3.6

From this, it is observed that the inverse of an identity matrix and identity matrix are the same.

Things to Remember

  • While using the MINVERSE function in Excel, #value error will occur if the matrix contained non-numerical values, empty cells, and having a different number of columns and rows.
  • #NUM error is displayed in the provided matrix is a singular matrix
  • #N/A error is displayed in the cells of the resulting inverse matrix is out of range. MINVERSE function results in the #N/A error in extra cells selected
  • The MINVERSE function must be entered as the array formula in excel into the spreadsheet.

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This has been a guide to Excel Inverse Matrix. Here we discussed how to inverse Matrix in Excel using MINVERSE() Function with examples and a downloadable excel template. You can learn more about excel from the following articles –

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