cell consisting letters and numbers to matrix double

Asked by Lotte van de Venis on 27 Oct 2017

Latest activity Commented on by Cedric Wannaz on 29 Oct 2017

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Hi,

I have a matrix containing 840x1 cells. These consist of 3 letters followed by numbers. Is there a way to convert this into 840x1 double?

I have tried str2double, but these returns only NaN. I tried several combinations with num2str, char, celstr, but i can't figure it out.

Thanks in advance!

2 Comments

Jan on 27 Oct 2017

Please give any meaningful example. What is the wanted result for 'ABC123'? How do you want to convert this to a number?

Walter Roberson on 28 Oct 2017

xlswrite('Name Excelfile.xlsx', [num2cell(Group), num2cell(Trail), mTrail], 1)

1 Answer

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Answer by Cedric Wannaz on 27 Oct 2017

Edited by Cedric Wannaz on 27 Oct 2017

>> C  = {'ABC8', 'CAD90.87', 'ZED40'} ;
>> C2 = cellfun( @(s)s(4:end), C, 'UniformOutput', false ) ;
>> str2double( C2 )
ans =
    8.0000   90.8700   40.0000

EDIT 1: here is a solution that extracts both parts:

>> data = textscan( [C{:}], '%3s%f' ) ;

With that you get

 >> data
 data =
  1×2 cell array
    {3×1 cell}    {3×1 double}
 >> data{1}
 ans =
  3×1 cell array
    {'ABC'}
    {'CAD'}
    {'ZED'}
 >> data{2}
 ans =
    8.0000
   90.8700
   40.0000

4 Comments

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Walter Roberson on 27 Oct 2017

How do you want the 'ABC' to be encoded into the double that you need to be output?

Cedric Wannaz on 27 Oct 2017

Please see my updated answer.

Cedric Wannaz on 29 Oct 2017

Does it solve your problem of splitting alpha codes and numbers or do you still have a problem with that?

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Lotte van de Venis (view profile)