How to extract vectors from strings

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KostasK
KostasK on 10 Nov 2021
Edited: Stephen on 10 Nov 2021
I have the following two strings from which I would like to extract the numbers in two respective vectors:
A = 'REAL 1.001 2.801 4.378 6.283 7.941 10.774 12.436 14.760 16.205 17.577 18.214 19.581 20.810 22.027' ;
B = '0.0 +3.188E-2 +8.918E-2 +1.394E-1 +2.000E-1 +2.528E-1 +3.430E-1 +3.959E-1 +4.698E-1 +5.159E-1 +5.595E-1 +5.798E-1 +6.233E-1 +6.625E-1 +7.012E-1' ;
However, str2num and str2double don't work well in these circumstances as in both cases text is contained within the string either in the first 'element' of the string vector, or as part of the scientific notation.
Also, I have tried sscanf(A, '%f'), however that suprisingly returns an empty vector.
Therefore, how can I extract these numbers from strings A and B ?

Accepted Answer

Stephen
Stephen on 10 Nov 2021
Edited: Stephen on 10 Nov 2021
>> A = 'REAL 1.001 2.801 4.378 6.283 7.941 10.774 12.436 14.760 16.205 17.577 18.214 19.581 20.810 22.027' ;
>> Av = sscanf(regexprep(A,'^[A-Za-z]+',''),'%f')
Av =
1.0010
2.8010
4.3780
6.2830
7.9410
10.7740
12.4360
14.7600
16.2050
17.5770
18.2140
19.5810
20.8100
22.0270
>> B = '0.0 +3.188E-2 +8.918E-2 +1.394E-1 +2.000E-1 +2.528E-1 +3.430E-1 +3.959E-1 +4.698E-1 +5.159E-1 +5.595E-1 +5.798E-1 +6.233E-1 +6.625E-1 +7.012E-1';
>> Bv = sscanf(B,'%f')
Bv =
0
0.0319
0.0892
0.1394
0.2000
0.2528
0.3430
0.3959
0.4698
0.5159
0.5595
0.5798
0.6233
0.6625
0.7012

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