How can I solve this error (Improper assignment with rectangular empty matrix.) with listed below script. Thanks

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Oday Shahadh 2017-1-9

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评论： Walter Roberson 2017-1-9

elevtocellsI1=accumarray(OrbNO,elev2,[],@(x) {x});
DDDD=zeros(1,size(elevtocellsI1,1));
for i=1:size(elevtocellsI1,1)
DDDD(i)=(find(elevtocellsI1{i}, 1, 'last' )-(find(elevtocellsI1{i}, 1 )))/60;
end
figure(567432)
bar(DDDD)
title('Passage Time Over the GS')
xlabel('time(Seconds)')
ylabel ('Passage Time (min)'),
grid on

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Stephen23 2017-1-9

@Oday Shahadh: please edit your question and give us the complete error message. That means all of the red text.

Also it helps if you give us code that actually works (so that we can run it), otherwise we have to rely on using our magic crystal balls to read what is on your computer monitor.

Oday Shahadh 2017-1-9

Improper assignment with rectangular empty matrix.

Error in BAN_FINAAl (line 710) DDDD(i)=(find(elevtocellsI1{i}, 1, 'last' )-(find(elevtocellsI1{i}, 1 )))/60;

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采纳的回答

Walter Roberson 2017-1-9

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Some of the cells resulting from accumarray are likely to be empty. find(elevtocellsI1{i}, 1, 'last' ) on the empty cell is going to be empty. (find(elevtocellsI1{i}, 1, 'last' )-(find(elevtocellsI1{i}, 1 )))/60 would then be empty. You try to assign that emptiness to a definite location DDDD(i)

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Oday Shahadh 2017-1-9

elevation.fig

I attached the elevation plot, in which each line segment on the time axes under each the fives curves represents the time the satellite spent over the GS