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I find there is some problem with the importdata function import data, there is some data without negative character?What is the reason?

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huazai2020
huazai2020 2020-7-5
关闭： Stephen23 2020-7-6
I find there is some problem with the importdata function import data, there is some data without negative character?What is the reason?
The below is the code:
clc;clear all;
filec=importdata('xcood-020.txt');
data(:,1)=filec.data;
please see the data file attached. How to deal with it ?

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Image Analyst
Image Analyst 2020-7-5
I don't know. I think maybe all the minus signs in the string on each line might be confusing it. Try readmatrix:
data = readmatrix('xcood-020.txt')

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