Min Function Matlab Index

If a is a matrix then min a is a row vector containing the minimum value of each column.

Min function matlab index. That is what if k is a vector of length m is there a quick and easy way to do this. If i want to shift the rows of an m by n matrix a by k places i use a n k 1 n 1 n k but what if k is a function of the row number. This will compare the numbers 8 and 1 and i want to retrieve the index of a for the value of 1. The name of the file and of the function should be the same.

Regular newsgroup contributor peter acklam posted this solution that uses sub2ind and linear. If a is a vector then min a returns the minimum of a. If a is a vector then max a returns the maximum of a. Thus linear indexing numbers the elements in the columns from top to bottom left to right.

If there are several identical minimum values the index of the first one found is returned. For example the following code produces a row vector m that contains the maximum value of each column of a which is 3 for the first column and 4 for the second column. For complex input a min returns the complex number with the largest complex modulus magnitude computed with min abs a and ignores the phase angle angle a. Note that in scilab second input parameter can give the dimension to use to find the minimum values or another matrix minimum of two matrices in matlab dimension parameter is given in a third input parameter in this case second parameter must.

If a is a multidimensional array then min a operates along the first array dimension whose size does not equal 1 treating the elements as vectors. Matlab min function can work with complexes what scilab min can not so a emulation function called mtlb min has been written. Max mean median sort. What i want is for row col to equal 4 4 because this is the index in a where the minimum of the subset is located.

If a is a multidimensional array then max a operates along the first array dimension whose size does not equal 1 treating the elements as vectors. A matlab user recently posed this question in the comp soft sys matlab newsgroup. A linear index allows use of a single subscript to index into an array such as a k matlab treats the array as a single column vector with each column appended to the bottom of the previous column. Functions operate on variables within their own workspace which is also called the local workspace separate from the workspace you access at the matlab command prompt which is called the base workspace.

The min and max functions in matlab return the index of the minimum and maximum values respectively as an optional second output argument. Instead what this will output now is 2 since the subset being considered is 8 1.