how to read a textfile that contain an array of text values into matrix
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I have a textfile that contain tab delimited hexadecimal values and I would like to transfer the values into an array with each element will keep a value in the table (attached)
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Massimo Zanetti
2017 年 3 月 16 日
編集済み: Massimo Zanetti
2017 年 3 月 16 日
Here is it, you should know how many columns your data span (I guessed by reading your file they are 25):
%open file
fname = 'PowerUpRampSpeed_1.txt';
fileID = fopen(fname);
%read formatted data as strings of 2 characters
A = textscan(fileID,'%2c','Delimiter','\t');
%reshape the vector to matrix size
cols = 25;
A = reshape( hex2dec(char(A)) , cols , [])';
%close file
fclose(fname);
Now, A is your matrix read into Matlab.
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Yoav Weizman
2017 年 3 月 20 日
編集済み: per isakson
2017 年 6 月 2 日
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Walter Roberson
2017 年 6 月 2 日
Your solution leaves the values as text. Were you wanting a text array, or were you wanting a numeric array?
Walter Roberson
2017 年 6 月 2 日
Oddly, at least on OS-X, textread() is not able to read files with the original name PowerUpRampSpeed_1µs.txt claiming they do not exist . I will be filing a bug report on that.
Walter Roberson
2017 年 6 月 2 日
S = fileread('PowerUpRampSpeed_1µs.txt');
temp = regexp( regexp(S, '\r?\n', 'split'), '\W+', 'split');
output = vertcat(temp{:});
The result will be a 32 x 200 cell array of character vectors; hex values will not be converted to numeric.
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