This post categorized under Vector and posted on March 11th, 2018.

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I have an m by n matrix in MATLAB say M. I have an n-element row vector i.e. a one by n column matrix say X. I know X is a row somewhere in M.for a matrix [1 2 3 4 6 10 7 5 9] mXn matrix-- how is it that i can find the min or max element and then find the row number and the column number for further use in I have a matrix with 20 columns and over 200000 rows. somewhere in this matrix there seems to be some strange datas which I would like to delete. If I am looking for the rownumbers where the value is higher than a specific value lets say I am looking for all the values in the first row that are

That code calculates the output (at least for me). Nothing is displayed to the screen because the line ends with a semicolon which suppresses this display.Obviously this can become a very complex (and tedious) process. However you can find many decent matrix multiplication tools online. I like this one by Matrix Reshish. After calculation you can multiply the result by another matrix and another meaning that you can multiply many matrices together.Let A be an m by n matrix. The vectore spanned by the rows of A is called the row vectore of A denoted RS(A) it is a subvectore of R n. The vectore spanned by the columns of A is called the column vectore of A denoted CS(A) it is a subvectore of R m.

What is not so obvious however is that for any matrix A the row rank of A the column rank of A. Because of this fact there is no reason to distinguish between row rank and column rank the common value is simply called the rank of the matrix.Systems of equations and matrix row operations Recall that in an augmented matrix each row represents one equation in the system and each column represents a variable or the constant terms. For example the system on the left corresponds to the augmented matrix on the right.Numbers that appear in the rows and columns of a matrix are called elements of the matrix. In the above matrix the element in the first column of the first row is 21 the element in the second column of the first row is 62 and so on.

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