Read Text File into a Matrix
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I would like to be able to read a text file into matlab and turn it into a matrix. The text file would look like this:
%Joint Properties
% Format is %joint# x_coord y_coord xdof# ydof#
1 0 0 4 5
2 120 0 1 6
3 120 120 2 3
I would like to turn the numbers into a matrix. How would I do this?
Also, how would I then access a single column in this matrix?
Is there a way to have Matlab count the number of rows in the matrix?
采纳的回答
Oleg Komarov
2011-3-16
% read in data
fid = fopen('filepath');
data = textscan(fid,'%f%f%f%f','HeaderLines',2,'CollectOutput',1);
data = data{:};
fid = fclose(fid);
% retrieve column 1
data(:,1)
% Number of rows
size(data,1)
I assumed the example of the text file doesn't have intervealing blank lines.
Oleg
3 个评论
Samuel Maliva
2016-2-26
Please can you explain the meaning of line 3: data = data{:};
Giulia Brusadin
2019-2-12
Might this work also with hexadecimal values? I have to register some mac address and they are represented by hex values
L.J.
2020-6-19
Curly brackets extract data.
更多回答（1 个）
Priya Shaji
2018-3-14
0 个投票
Hi I want to read txt files and plot in matlab using imshow
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