matlab find function usage
In the first step, we first need to know that the find function in matlab can find non-0 The subscript and value of the element can also be found to meet the conditions. Enter help find in the command line window, and you can see the function usage, as shown in the following figure:
The second step is to enter a=[1 0 5 4 3 8 0 9] in the matlab command line window and press Enter to create an array a, as shown in the following figure:
In the third step, enter find(a) and press the Enter key to find the subscripts of all non-0 elements in the a array, as shown in the following figure:
In the fourth step, enter find(a>4) to find the element subscripts of the a array greater than 4, as shown in the figure below:
In the fifth step, enter [i ,j,k]=find(a), you can find the subscript position and value of the non-0 element of the matrix a. Use the find function as needed, mainly to find the element subscript or find the non-0 element according to the conditions, as shown in the figure below ：
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