Looping outputs URGENT please help

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Robert
Robert 2015-2-26
评论： dpb 2015-2-26
I have the following code. As you can see it sorts some data, then performs a stepwise regression with the data. I need the output for each loop printed, preferably all on the same sheet (B is the only output I want). You can see where I have made an attempt under %Get Output. I am a total matlab newbie and horrible at it so as much detail as possible would be appreciated. Thank you in advance for any help!
%Sort the Data [rows, cols]=size(A03); for i = 1:rows
for j = 1:cols
y=zeros(8,1)
x=zeros(8,3)
for m=1:8
y(m)=NDVI((m-1)*rows+i,j)
x(m,1)=PET((m-1)*rows+i,j)
x(m,2)=P((m-1)*rows+i,j)
x(m,3)=Amp((m-1)*rows+i,j)
end
%Run the stepwise Regression
if sum(sum(isnan(x)),2)==0 && sum(isnan(y))==0
xx=x(:,1:3); yy=y(:,1);
[B,SE,PVAL,INMODEL,STATS,NEXTSTEP,HISTORY]= ...
stepwisefit(xx,yy,'penter',.05);
%Get Outputs
B = zeros(size(A03));
[B(1:1, 1:3, :)] = stepwisefit(xx,yy,'penter',.05);
end
end
end
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Robert
Robert 2015-2-26
Thanks for your help! I didn't delete the question, not sure what you mean...
dpb
dpb 2015-2-26
Hmmm....somebody did; the same question w/o the "URGENT" label disappeared between the time I first responded but was gone by time tried to Submit...if it wasn't you who did it, sorry.

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dpb
dpb 2015-2-26
...
[B,SE,PVAL,INMODEL,STATS,NEXTSTEP,HISTORY]= ...
stepwisefit(xx,yy,'penter',.05);
%Get Outputs
B = zeros(size(A03));
[B(1:1, 1:3, :)] = stepwisefit(xx,yy,'penter',.05);
...
Above you computed the coefficients and then immediately wiped them out and then do the work all over again...what's the point in that??? :)
If all you're wanting is to output the coefficient array, then
[B,SE,PVAL,INMODEL,STATS,NEXTSTEP,HISTORY]= ...
stepwisefit(xx,yy,'penter',.05);
dlmwrite('file.txt',B,'delimiter',' ','precision','%14.8f','-append')
Adjust format to suit and obviously use a better file name and it would be good to also add some sort of identifier as to case number or something to identify who's who in the zoo of models.

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