How does ind2sub work in MATLAB?
The ind2sub command determines the equivalent subscript values corresponding to a single index into an array. [I,J] = ind2sub(siz,IND) returns the matrices I and J containing the equivalent row and column subscripts corresponding to each linear index in the matrix IND for a matrix of size siz .
What is sub2ind in MATLAB?
Description. The sub2ind command determines the equivalent single index corresponding to a set of subscript values. IND = sub2ind(siz,I,J) returns the linear index equivalent to the row and column subscripts I and J for a matrix of size siz .
How do you find the minimum value in MATLAB?
x = fminbnd( problem ) finds the minimum for problem , where problem is a structure. [ x , fval ] = fminbnd(___) , for any input arguments, returns the value of the objective function computed in fun at the solution x .
How do you write summation in MATLAB?
F = symsum( f , k , a , b ) returns the sum of the series f with respect to the summation index k from the lower bound a to the upper bound b . If you do not specify k , symsum uses the variable determined by symvar as the summation index. If f is a constant, then the default variable is x .
What does [I1] = ind2sub(SZ) mean?
Here sz is a vector with two elements, where sz (1) specifies the number of rows and sz (2) specifies the number of columns. [I1,I2,…,In] = ind2sub (sz,ind) returns n arrays I1,I2,…,In containing the equivalent multidimensional subscripts corresponding to the linear indices ind for a multidimensional array of size sz.
What is the output size of ind2sub in Python?
If you specify only two output arguments, ind2sub ignores the third dimension of the array and returns subscripts for a 2-dimensional array with size 2-by-4 instead. If you specify only one output argument, ind2sub ignores the second and third dimensions of the array and returns subscripts for a 1-dimensional array with size 1-by-8 instead.
Why are my index versions different when using ind2sub?
Check that both index versions refer to the same element of the array. When using ind2sub for an N-dimensional array, you would typically supply N output arguments for each dimension of the matrix. This example shows the different results when you return fewer output arguments for a 3-dimensional array.
How do you find the indices of a matrix in MATLAB?
To get the linear indices of matrix elements that satisfy a specific condition for matrix A, you can use the find function with one output argument. To get the subscript indices, use the find function with two output arguments. For example, [row,col] = ind2sub (size (A),find (A>5)) gives the same result as [row,col] = find (A>5).