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# cell consisting letters and numbers to matrix double

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Lotte van de Venis on 27 Oct 2017
Commented: Cedric Wannaz on 29 Oct 2017
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)

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### Answers (1)

Cedric Wannaz on 27 Oct 2017
Edited: 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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