Finding the first, second and third maxima in a plot

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Ricky
Ricky 2013-5-28
Hello Everyone,
I want to extract the first the maximas in my graph and save the sequence in a seperate variable. I know the maximum function gives me the maximum value in a data set. But I am not able to use this information for finding the next peaks. I have uploaded the graph on the following link and I will mark the peaks which I want to extract from this.
http://tinypic.com/r/59u06q/5
Thanks

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回答（1 个）

Image Analyst
Image Analyst 2013-5-28
Try using findpeaks() in the Signal Processing Toolbox or imregionalmax() in the Image Processing Toolbox.
  2 个评论
Ricky
Ricky 2013-5-28
编辑：Ricky 2013-5-28
I would like to thank you with this findpeaks() command.
While searching in the help I found this findpeaks command also. But now I am having another problem. My data is having 179 rows and 4010 columns. So I use a for loop and evaluate the peaks using findpeaks() function. My problem now is to store this new variable of size 179 rowsand unknown columns.
Image Analyst
Image Analyst 2013-5-28
You can use a cell array to store variable-sized information, so row 1 could have 9 peaks, row 2 could have 5 peaks, and row 3 can have 11 peaks, etc. See the FAQ for a discussion of cell arrays: http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F

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