find local max in a matrix

2016 2 22
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更新时间：2016 2 22
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Hello.I have this matrix
A=[116 3;107 6;114 6;119 6;117 9;120 9;108 15
;113 18;115 18;112 21;111 24]
.I want to detect local maximums from second column and where local max happened that row should be kept in a new matrix. here (112 21) & (111 24) should be saved in matrix B. can any one help me plz?

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Stephen23
Stephen23 2016-2-22
编辑：Stephen23 2016-2-22
@ Fateme Jalali: please stop posting duplicate questions. You have posted this four times so far. It does not help you get an Answer! If you want to give more information just write comments to this Question.

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回答（1 个）

Image Analyst
Image Analyst 2016-2-22

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You can get the local max with imdilate():
A=[116 3;107 6;114 6;119 6;117 9;120 9;108 15
;113 18;115 18;112 21;111 24]
windowSize = 3;
maxCol2 = imdilate(A(:,2), true(windowSize, 1))
I'm not sure why you have only two rows instead of local max for every row.

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