Extracting numerical data from a char vector
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I'm trying to extract numerical data from a character vector using regexp. The character vector data that I'm interested in is
Latitude: XXX.XXXX
Longitude: XXX.XXXX
Heading: XXX.XXXX
where X represents a digit. Each of the numerical data entries can be 2 or 3 digits to the left of the decimal place and 3 or 4 digits to the right of the decimal place. Although the character vector is a row vector, I believe that the latitude, longitude, and heading entries are separated by line breaks.
How can I extract the latitude, longitude, and heading data and place them into their own individual latitude, longitude, and heading vectors of doubles?
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Stephen23
2022-4-1
回答（1 个）
% making up a character vector as described:
lat = 40.23;
lon = -32.674;
heading = 66.96;
str = sprintf('%8.4f\n%8.4f\n%8.4f',lat,lon,heading)
% getting the values back out using regexp:
vals = regexp(str,'([-\.\d]+)','tokens');
vals = str2double([vals{:}])
recovered_lat = vals(1:3:end);
recovered_lon = vals(2:3:end);
recovered_heading = vals(3:3:end);
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2022-3-31
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