regexp usage for cellArray data which includes both characters and numbers.

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sermet
sermet 2013-7-10
cellArray=cellstr(cellArray)
cellArray =
'O2930202 465254.432 4066809.025'
'O2910008 499252.083 4042876.84'
'O2920014 494404.625 4047958.526'
Name Size Bytes Class Attributes
cellArray 22x1 4236 cell
%when I want to extract first column of the cellArray, I use
out1 = regexp(cellArray,'(?<=^\s*)\d*','match')
out1 = cat(1,out1{:})
out1 = sprintf('%s\n', out1{:})
%but it doesn't work because there are characters with numbers. It only works if only numbers are exist.
%what kind of code I need to write for extracting first column in terms of both characters and numbers.

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2013-7-10
cellArray ={'O2930202 465254.432 4066809.025';
'O2910008 499252.083 4042876.84';
'O2920014 494404.625 4047958.526'}
out1 = regexp(cellArray,'(^[a-zA-Z]*)|((?<=^\w*)\d*)','match');
out = cat(1,out1{:});

更多回答（1 个）

Jim Hokanson
Jim Hokanson 2013-7-10
Try not to use lookaround operators in Matlab.
If you only want the first column:
first_column_string = regexp(cellArray,'\d+','match','once')
first_column_numbers = str2double(first_column_string)
The key is using 'once' ...
If your input was a single string you could use textscan:
str = strjoin(cellArray','\n') %2013a?
or
temp = strcat(cellArray,{char(10)});
str = [temp{:}];
data = textscan(str,'O%f %f %f','MultipleDelimsAsOne',true);
first_column_numbers = data{1}

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