Find Function In Mat

Matlab provides its user with a basket of functions in this article we will understand a powerful function called find.

Find function in mat.

Find the vertex of the function if it s quadratic. To find array elements that meet a condition use find in conjunction with a relational expression. But if you re working with a parabola or any equation where the x coordinate is squared or raised to an even power you ll need to plot the vertex. For example find x 5 returns the linear indices to the elements in x that are less than 5.

In its simplest form find function will return the indices of array x that points to the nonzero elements. A function is a special type of relation where. If you re working with a straight line or any function with a polynomial of an odd number such as f x 6x 3 2x 7 you can skip this step. In general find x regards x as x which is the long column vector formed by concatenating the columns of x.

If none are found find returns an empty 0 by 1 matrix. A idx and b are vectors. Every element in the domain is included and. I am trying to convert matlab code to c.

A function takes elements from a set the domain and relates them to elements in a set the codomain. Indices find x k or indices find x k first returns at most the first k indices corresponding to the nonzero entries of x. In matlab i use the find function to get the indices of a vector and then copy these to other variables. A function relates inputs to outputs.

S is a scalar in c opencv c 14 opencv 3 4 10 i know i can use the findnonzero function but it returns both row and column. If it finds none the function will return an empty matrix.