Error "not enough input arguments" in length function

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I am trying to run a code but receiving an error at the 4th line with 'not enough input' for the length function. What can be inserted in further to remove the error.
function [coef] = ComputeCurve_EDIT (SUBJRAWSubj1S1)
coef = [];
i = 1; % matrix row index
NRrows = Length (SUBJRAWSubj1S1);
while (i <= NRrows) % while not end of matrix
x = []; % initialize to-be-filled vectors
y = [];
xnorm = [];
ynorm = [];
n = i; % keeps track of the number of samples on a given trial
trialNR = SUBJRAWSubj1S1 (i, 1);
while (SUBJRAWSubj1S1 (i, 1) == trialNR) % fill x and y coordinate vectors
x = [x; SUBJRAWSubj1S1 (i, 2)];
y = [y; SUBJRAWSubj1S1 (i, 3)];
i = i + 1;
if (i> NRrows)
break
end
end
  3 个评论
Tanaya Chatterjee
Tanaya Chatterjee 2020-6-21
hello, thank you for your response.
I have a data with three columns with around 150 rows. trial number, x position and y position.
I want matlab to screen throught the length/ size of the rows in the columns and assign that variable as Nrows. What do you think should be the 'D' in size(x,D) because when i try size(x) it is returning not enough input argument.
Thank you for your help!
dpb
dpb 2020-6-21
As said, if you are concerned about the rows, that's dimension 1 so the 'D' argument to size would be one.

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