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From: Matt Fetterman on 2 Jan 2010 14:45 "Frank Sabouri" <Frank.Sabouri(a)gmail.com> wrote in message <hho71f$t33$1(a)fred.mathworks.com>... > "Matt Fetterman" <mattinjersey(a)yahoo.com> wrote in message <hhmp1i$bc2$1(a)fred.mathworks.com>... > > "Frank Sabouri" <Frank.Sabouri(a)gmail.com> wrote in message <hhmnvu$7a4$1(a)fred.mathworks.com>... > > > "Matt Fetterman" <mattinjersey(a)yahoo.com> wrote in message <hhmkfd$t5s$1(a)fred.mathworks.com>... > > > > "Frank Sabouri" <Frank.Sabouri(a)gmail.com> wrote in message <hhmifj$q68$1(a)fred.mathworks.com>... > > > > > Hi: > > > > > > > > > > There is a matrix that is "x" [different conditions (168)-by-variables (9)]. You suppose that I made 28 different sub-matrices from "x", wherein size of each sub-matrix is (6-by-9). I want to compute Euclidean distances among 9 variables for any given sub-matrix. > > > > > > > > > > X (:,:,:)=subdivide (x,6,9); % size of cell is (6,9,28) > > > > > for i = 1:28, > > > > > [Y] = pdist (X(:,:,i)'); > > > > > Ym=mean (Y) ; > > > > > Z=linkage(Ym,'average'); > > > > > end > > > > > > > > > > May please somebody show me where the problem is. > > > > > > > > > > Thanks, > > > > > > > > > > Frank > > > > > > > > > > > > > > > > > > Perhaps you could explain what the error is that you are getting or how it is going wrong? > > > > Regards Matt > > > > > > Hi Matt: > > > > > > Actually, I expected to get an output (Y) that is a matrix (28-by-36) that depicts Euclidean distances for 28 different sub-matrices; however, the output is only a vector that shows Euclidean distances for only one of sub-matrices which is number 28. > > > > > > Cheers, > > > > > > Frank > > > > Hi Frank, The problem is with your loop. The loop cycles through different values of i and you will want to assign the output of each time you run the loop to a different variable or a different spot in the output matrix. For example, > > P(i,1:10)=Z; > > > > Regards! Matt > > Hi Matt, > > I tried to insert your comment on the loop. Please let me know if it is what I should do. > > for i = 1:28, > [Y] = pdist (X(:,:,i)'); > P(i,1:28)=28; > end > > Ym=mean (Y) ; > Z=linkage(Ym,'average'); > > Regadrs, > Farnk Hi Frank, No that is not quite what I meant. Look at your original loop: for i = 1:28, [Y] = pdist (X(:,:,i)'); Ym=mean (Y) ; Z=linkage(Ym,'average'); end This loop executes 28 times and produces a different value of Z every time. So in your original program, the output value of Z will be that value obtained for the last value of the loop, when i=28. But what you want is to store the value of Z for every value of the loop, from i=1 to 28. I am not sure of the size of Z in your program. Maybe it is 1x9 ? So the modified loop could look like this : for i = 1:28, [Y] = pdist (X(:,:,i)'); Ym=mean (Y) ; Z=linkage(Ym,'average'); Zout(i,1:9)=Z; end; And you see what that does, it stores the value of Z in a different location for each value of i. Then the Zout variable will contain your desired data. Regards! Matt
From: Frank Sabouri on 3 Jan 2010 00:13
"Matt Fetterman" <mattinjersey(a)yahoo.com> wrote in message <hho7o0$d1i$1(a)fred.mathworks.com>... > "Frank Sabouri" <Frank.Sabouri(a)gmail.com> wrote in message <hho71f$t33$1(a)fred.mathworks.com>... > > "Matt Fetterman" <mattinjersey(a)yahoo.com> wrote in message <hhmp1i$bc2$1(a)fred.mathworks.com>... > > > "Frank Sabouri" <Frank.Sabouri(a)gmail.com> wrote in message <hhmnvu$7a4$1(a)fred.mathworks.com>... > > > > "Matt Fetterman" <mattinjersey(a)yahoo.com> wrote in message <hhmkfd$t5s$1(a)fred.mathworks.com>... > > > > > "Frank Sabouri" <Frank.Sabouri(a)gmail.com> wrote in message <hhmifj$q68$1(a)fred.mathworks.com>... > > > > > > Hi: > > > > > > > > > > > > There is a matrix that is "x" [different conditions (168)-by-variables (9)]. You suppose that I made 28 different sub-matrices from "x", wherein size of each sub-matrix is (6-by-9). I want to compute Euclidean distances among 9 variables for any given sub-matrix. > > > > > > > > > > > > X (:,:,:)=subdivide (x,6,9); % size of cell is (6,9,28) > > > > > > for i = 1:28, > > > > > > [Y] = pdist (X(:,:,i)'); > > > > > > Ym=mean (Y) ; > > > > > > Z=linkage(Ym,'average'); > > > > > > end > > > > > > > > > > > > May please somebody show me where the problem is. > > > > > > > > > > > > Thanks, > > > > > > > > > > > > Frank > > > > > > > > > > > > > > > > > > > > > > Perhaps you could explain what the error is that you are getting or how it is going wrong? > > > > > Regards Matt > > > > > > > > Hi Matt: > > > > > > > > Actually, I expected to get an output (Y) that is a matrix (28-by-36) that depicts Euclidean distances for 28 different sub-matrices; however, the output is only a vector that shows Euclidean distances for only one of sub-matrices which is number 28. > > > > > > > > Cheers, > > > > > > > > Frank > > > > > > Hi Frank, The problem is with your loop. The loop cycles through different values of i and you will want to assign the output of each time you run the loop to a different variable or a different spot in the output matrix. For example, > > > P(i,1:10)=Z; > > > > > > Regards! Matt > > > > Hi Matt, > > > > I tried to insert your comment on the loop. Please let me know if it is what I should do. > > > > for i = 1:28, > > [Y] = pdist (X(:,:,i)'); > > P(i,1:28)=28; > > end > > > > Ym=mean (Y) ; > > Z=linkage(Ym,'average'); > > > > Regadrs, > > Farnk > > Hi Frank, > No that is not quite what I meant. > Look at your original loop: > > for i = 1:28, > [Y] = pdist (X(:,:,i)'); > Ym=mean (Y) ; > Z=linkage(Ym,'average'); > end > > This loop executes 28 times and produces a different value of Z every time. > So in your original program, the output value of Z will be that value obtained for the last value of the loop, when i=28. But what you want is to store the value of Z for every value of the loop, from i=1 to 28. > I am not sure of the size of Z in your program. Maybe it is 1x9 ? > So the modified loop could look like this : > > for i = 1:28, > [Y] = pdist (X(:,:,i)'); > Ym=mean (Y) ; > Z=linkage(Ym,'average'); > Zout(i,1:9)=Z; > end; > > And you see what that does, it stores the value of Z in a different location for each value of i. Then the Zout variable will contain your desired data. > > Regards! Matt Hi Matt, Now, it works. Thanks, Frank |