Info

此问题已关闭。 请重新打开它进行编辑或回答。

Why do I get a 6x30 matrix instead than a 1031x30

4 次查看（过去 30 天）
PaoloPa
PaoloPa 2014-2-23
关闭： MATLAB Answer Bot 2021-8-20
Hi, I run this code and I got as a result a 6x30 matrix instead than a 1031x30.
Total weeks is long 1052 cells, startweek is 8. orderweeks is 6 cells long, and the result shows only the last 6 rows of the whole period.
for k = startweek:totalweeks-p1-p2-1
start1 = k;
stop1 = start1+p1-1;
orderweeks = start1:stop1;
start2 = stop1+2;
stop2 = start2+p2-1;
holdweeks = start2:stop2;
nstocks = nbrstocks(k);
% order R for the ordering weeks
data1 = stockdata(orderweeks, 1:nstocks);
I am not sure I made myself very clear.... Thanks anyway
PP.
  1 个评论
Walter Roberson
Walter Roberson 2014-2-23
Where is the end of your "for" loop?
As you are in a "for" loop, which variable are you saving results into that is not overwritten by the next iteration of the loop ?

此问题已关闭。

回答（1 个）

PaoloPa
PaoloPa 2014-2-24
Ok then I put the whole code..
for k = startweek:totalweeks-1-p1-p2
start1 = k; stop1 = start1+p1-1; orderweeks = start1:stop1;
start2 = stop1+2;
stop2 = start2+p2-1;
holdweeks = start2:stop2;
nstocks = nbrstocks(k);
% order R for the ordering weeks data1 = stockdata(orderweeks, 1:nstocks);
R1 = ones(1,nstocks);
for m = 1:length(orderweeks)
R1 = R1.*data1(m,:);
end
R1 = R1-1;
% select for the winners and losers
[B,idx] = sort(R1,'descend');
ncandidates = round(nstocks*0.1);
idwinner(k,1:ncandidates) = stockid(idx(1:ncandidates));
idloser(k,1:ncandidates) = stockid(idx(end-ncandidates+1:end));
% caculate the R for winners and losers in holding weeks
data2winner = stockdata(holdweeks, idx(1:ncandidates));
data2loser = stockdata(holdweeks, idx(end-ncandidates+1:end));
R2w = ones(1,ncandidates);
R2l = ones(1,ncandidates);
for m = 1:length(holdweeks)
R2w = R2w.*data2winner(m,:);
R2l = R2l.*data2loser(m,:);
end
R2w = R2w-1;
R2l = R2l - 1;
Rwinner(k) = mean(R2w);
Rloser(k) = mean(R2l);
end
end end
  1 个评论
PaoloPa
PaoloPa 2014-2-24
I've been trying this
data1 = stockdata(isfinite(stockdata(orderweeks, :)));
but I stillget bizarre results...like a 180x1 vector.... Any help is very much appreciated mate

此问题已关闭。

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by