how to change matrix dimensions?

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lina
lina 2014-5-23
评论： Image Analyst 2014-5-24
hi all
how can i change the matrix dimension from 312*1 to 276*1
thank you
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Mahdi
Mahdi 2014-5-23
Do you know which index that the year 2006 corresponds to in the second matrix? (Where does the data stop for 2006?) Similarly, does your matrix tell you which year corresponds to which data point?

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Mahdi
Mahdi 2014-5-23
Based on what you told me, let's say that the data for the years 1984-2009 is stored in matrix A, you would simply do:
B=A(1:276,1);
Where B is the matrix containing the data from 1984 to 2006 if the year 2006 ends at the 276th row.
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Image Analyst
Image Analyst 2014-5-24
By the way, you're not changing the dimension of your matrix. What's you're doing is extracting a portion of A into a new matrix B. Nothing got changed.

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Image Analyst
Image Analyst 2014-5-23
Try interp2() or (much, much easier) try imresize() if you have the Image Processing Toolbox.

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