saving data from text file which meets conditions

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Chris Murchison
Chris Murchison 2021-3-19
编辑： Jan 2021-3-23
Hi, I am trying to save rows of data which meet the criteria that I am setting.
I have a large text file and trying to save the rows which meet conditons to preproces my data.
I am getting the error:
Error using norm
First argument must be single or double.
Error in remove_first_row (line 4)
if norm(xyData(i,2:4))>1E-3
Can anyone help?
xyData = ('ANNDB1.txt');
T = [];
for i = 1:length(xyData)
if norm(xyData(i,2:4))>1E-3
if norm(xyData(i,8:10))>1E-3
if norm(xyData(i,14:16))-norm(1,1,0)>1
T = [T; xyData(i,:)]
end
end
end
end
P = table(T(:,1), T(:,2:4), T(:,5:7), T(:,8:10), T(:,11:13), T(:,14:16), T(:,17:19), 'VariableNames', {'t', 'U1', 'U2', 'V1', 'V2', 'R1', 'R2'});
writetable(T,'PrePANNDB1.txt')

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回答（1 个）

Jan
Jan 2021-3-23
编辑：Jan 2021-3-23
xyData = ('ANNDB1.txt');
Now xyData is the char vectpr 'ANNDB1.txt' . I guess, this is a file name. Then you have to import the contents of the file at first. Processing the name of the file is not useful. Maybe:
xyData = readtable('ANNDB1.txt');

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