Read Multiple Entries from Text File
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May i know how can i import multiple entries such as this:
32*0 0.237024 0.248206 39*0 0.217874 0.160635
0.193782 0.242259 0.281551 37*0 0.168798 0.178275
As for the first input, i want to create 32 separate inputs of zeros. Thank you.
采纳的回答
Mathieu NOE
2021-3-16
so this is the code , maybe there is still room for improvement , but I tested it ok vs the data file provided
hope it helps
clc
clearvars
Filename = 'data.txt'
output = extract_data(Filename); % cell array
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function output = extract_data(Filename)
fid = fopen(Filename);
tline = fgetl(fid);
k = 0;
while ischar(tline)
k = k+1;
% find position where the zero product appear in each line
if contains(lower(tline),'*0') % lower make matlab not case sensitive
ind_asterix = strfind(lower(tline),'*0')
for ci = 1:length(ind_asterix)
ind_start = max(1,ind_asterix(ci)-5);
ind_stop = ind_asterix(ci)-1;
nb_of_zeros(ci) = str2num(tline(1,ind_start:ind_stop));
end
% let's split each line in individual scalars and replace the zero
% with new vector
tline_num = str2num(tline);
q = 0;
line_all = [];
for ci = 1:length(tline_num)
tline_extract = tline_num(1,ci);
if tline_extract == 0
q = q+1;
str = num2str(zeros(1,nb_of_zeros(q)));
else
str = num2str(tline_extract);
end
% concat all segements together
line_all = [line_all, ' ', str];
end
else
line_all = tline;
end
% output{k} = line_all; % array of char
output{k} = str2num(line_all); % numerical (vector)
tline = fgetl(fid);
end
fclose(fid);
end
更多回答（1 个）
Mathieu NOE
2021-3-16
hello
you can concatenate datas and vectors of zeros like that :
a = [zeros(1,32) 0.237024 0.248206 zeros(1,39) 0.217874 0.160635];
b = [0.193782 0.242259 0.281551 zeros(1,37) 0.168798 0.178275];
3 个评论
Jey Ganasan
2021-3-16
Mathieu NOE
2021-3-16
ok
so you have a text file , and each line must be converted to a numerical vector , with , for example " 10*0 " converted into zeros (1,10) ? am I right ?
Jey Ganasan
2021-3-16
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