Error: In an assignment A(I) = B, the number of elements in B and I must be the same

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BOB 2014-5-20

0
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https://ww2.mathworks.cn/matlabcentral/answers/130331-error-in-an-assignment-a-i-b-the-number-of-elements-in-b-and-i-must-be-the-same

评论： Sara 2014-5-21

采纳的回答： Sara

在 MATLAB Online 中打开

Not sure if anyone will beable to help me but thought I might as well ask.

This is my code I'm currently using:

%%Define Variables
g=9.81 %define gravity as 9.81
Numbertrials=90 %number of trials
FrameR = 0.001 %Frame rate was 1000
%Data in
for i=[1:Numbertrials]
      if i<10
      filein='Trial0';
  else filein='Trial';
  end
datain = csvread([filein num2str(i) '.CSV'],5,2); %read data in from the csv files
 %%Find peak jump height
Num0(i)=find(datain(2790:6000,1)==0);%How many 0 readings = time in air   
FT(i)=length(Num0)*FrameR; %Time of flight
PeakDisp(i)=(0*(FT/2))-(0.5*g*(FT/2)^2); %Peak Jump Height using vt-0.5*a*t^2
end

I am getting an error on the Num0(i)=...line. I know this is because find returns all row numbers where the condition is met, so I get a lot of row numbers to come out of this function. And I am trying to fit them all into a single element (Num0(i)) which it can’t do, hence the error.

So I was wodnering if anyone knew how I could fix this easily?

If any extra information is needed let me know

Thanks