How to convert String of data to Int variable on Matlab?

Question

I have a textdata {} Total number of rows 5.4 million with 3-4 digit integers. I wish to convert them to int on MATLAB.

I tried using x = str2num(total_data(1:end,:)) but it didnt work.

PopcornKing · Accepted Answer · 2012-04-24 22:33:24Z

1

To return integers , you have to add a prefix and suffix to the string...

>> c = '1234567'

c =

1234567

>> class(c)

ans =

char

>> result = str2num(c)

result =

 1234567

>> class(result)

ans =

double

>> result = str2num(['int32(' c ')'])

result =

 1234567

>> class(result)

ans =

int32

answered Apr 24, 2012 at 22:33

PopcornKing

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slayton · Accepted Answer · 2012-04-24 19:52:03Z

0

b = cellfun(@(x)str2double(x), total_data);

edited Apr 24, 2012 at 19:52

slayton

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answered Apr 24, 2012 at 19:16

razshan

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Pursuit · Accepted Answer · 2012-04-25 06:33:15Z

0

I would do something like this:

%Test data
N = 1e4;
textdata = cell(N,1);
for ix = 1:N
    textdata{ix} = num2str(ix);
end

%Convert to integers
dataAsInts = zeros(size(textdata),'int32');
for ix = 1:N
   dataAsInts(ix) = int32(sscanf(textdata{ix},'%d'));
end

answered Apr 25, 2012 at 6:33

Pursuit

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