Limiting vectors to a certain number of rows

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Giovanni
Giovanni 2013-12-12
评论： Walter Roberson 2013-12-12
Hi, i have created a function that creates n lots of a matrix of 3 columns but different number of rows. How do i limit the number of rows so that each of this matrixes has say 4 rows?

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回答（1 个）

Wayne King
Wayne King 2013-12-12
It depends which 4 rows you want to choose out of each of the matrices. Do you always want the first 4 rows?
If so, then in your code after you create the matrix, remove the trailing rows.
X = randn(10,10);
X(5:end,:) = [];
  2 个评论
Giovanni
Giovanni 2013-12-12
thanks man yeah i want the first 4 rows of each, what does the randn(10,10) command do?
Walter Roberson
Walter Roberson 2013-12-12
randn(10,10) creates some random sample data to illustrate the solution.

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