Here the size of the matrix is 3 by 4 as shown in the above statement. Now let’s see another example of eye () function as follows.īy using the above statement we try to implement the rectangular matrix. The final output of the above statement we illustrated by using the following screenshot as follows. In which all diagonals are ones and other elements are zeros. Similarly, we can create a square matrix by using the eye () function as follows.īy using the above statement we try to create the 4 by 4 square identity matrix. Notice here all diagonals are ones and other elements are zero. In the above example, we try to create an n – by – n matrix by using the Matlab eye () function here the value of n is 5 so we created a 5 by 5 matrix and A is the variable name that we assign for the matrix. Now let’s see a very simple example of eye () function Now let’s see different examples of Matlab eye () function for better understanding as follows. It also uses the same data types such as double, single, int8, int16…Up to int64. If the size is negative then we can consider it as 0.If the size is 0 then we can consider the matrix as empty.It is used to specify the row vector that does not have more than two integer values and it also has the following properties as follows. It also uses the same data types that mean double, single, int8, int16…Up to int64. If the value of m is negative then we consider it as 0 or we can treat it as a 0.If the value of m is 0 then the matrix is 0.Normally dimension size of the second variable is always an integer and it has the following properties as follows. It uses different data types such as double, single, int8, int16…Up to int64.ĭimension Size of the second variable (m): If the value of n is negative then we can consider it as 0 or we can treat it as a 0.If the value of n is zero then we can consider the matrix as empty.If the value of n is only an integer input argument then matrix (I) is a square that we can consider as n – by- n matrix.Here we consider n and I variables for an explanation. Normally dimension size of the first variable is always an integer and it has the following properties as follows. Now let’s see how the eye () function works in Matlab as follows. Now let’s see the different input arguments that are required for the eye () function as follows.ĭimension Size of the first variable (n): In the fourth syntax, we define the array size as shown in the above syntax, which means it returns the ones on the main diagonal and zeros elsewhere. In the third syntax we define n by m size of matrix it is also used to return whose main diagonal is ones and zeros elsewhere. That means it is used to identify the n by n matrix whose main diagonal is ones and zero. Where each row of idx contains the indices for the matrix.In the second we pass the size of a matrix with eye () function as shown in the above syntax. k=1 gives the first upper diagonal, k=-4 gives the lower left corner in this example.įor completeness, if you just want the indices instead of a full matrix (since you suggested you wanted to insert a vector into a present matrix) you can use the following function: function = diagidx(n,k) 0 is the main diagonal, positive integers are increasingly further away upper diagonals and negative integers the same for the lower diagonals i.e. Where the syntax of diag(V,k) is: V is the vector to be put on the diagonal (be it ones, or any odd vector), and k is the label of the diagonal. Diag has this functionality built in: diag(ones(4,1),1)
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