How to split tall array with logical array?

1 次查看（过去 30 天）

Mathias 2017-11-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/367166-how-to-split-tall-array-with-logical-array

Hi everyone,

I have a tall array with measured data 'Output.uniData'. Via a filter i select different value ranges for the measured channels. For Example:

Setup.Selection(1).name = 'Chan7';
Setup.Selection(1).range = [1 100 ; 301 400]; % (>=1 & <=100) | (>=301 & <=400)
Setup.Selection(2).name = 'Chan5';
Setup.Selection(2).range = [1 200];

After checking the conditions and Logical operations i get a Logical tall Array 'Output.selectedLines' where every matching line is true.

In non-tall application then i would do something like this to store each block of trues in a separate file:

% evaluation areas
tempRange=[];
tempRange(:,1)=find(diff([false; Output.selectedLines; false],1,1)==1); % start of blocks
tempRange(:,2)=find(diff([false; Output.selectedLines; false],1,1)==-1); % end of blocks
% tempRange(:,1)=find(diff([tall(false); Output.selectedLines; tall(false)],1,1)==1); % doesnt work cause of find
% tempRange(:,2)=find(diff([tall(false); Output.selectedLines; tall(false)],1,1)==-1);
tempRange(end,:)=[];
for range=1:size(tempRange,1)
      Head=Output.uniHeader;
      Data=Output.uniData(tempRange(range,1):tempRange(range,2),:);
      save(['file_' sprintf('%03d', range) '.mat'],'Data','Head');
end