DatabaseCell2Mat

Converts the cell matrix that the Database Toolbox provides into a numeric matrix and a structure.

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DATABASECELL2MAT converts the cell matrix that the Database Toolbox provides into a numeric matrix and a structure. The fieldnames of the structure will be the same as the column names of the tables.

It converts date/time types into MATLAB julians and bit types into 1s and 0s.

Without this utility, dates would be in string format not compatible with datenum and the bit types would be "true" or "false".

CAVEATS:
Times are ignored
Strings are not handled.

INPUTS:
Cellstring matrix
Table attributes

USAGE:
c=database('mydb','','');
query=['SELECT * FROM mytable;'];
curs=exec(c,query);
curs=fetch(curs);
[mat,s]=DatabaseCell2Mat(curs.Data,attr(curs));
close(c);
>> curs.data(1:4,:)
[4.2][1x21 char][-13.3][ 1.8][ 6.4][-7.9][-24.7][1x21 char] 'false'
[5.5][1x21 char][ -4.7][ 6.8][11.7][-1.8][-17.2][1x21 char] 'false'
[ 4][1x21 char][ -7.3][ 2.3][ 7.2][-3.7][-17.1][1x21 char] 'false'
[5.7][1x21 char][ -6.6][-0.3][ 9.4][-1.6][ -16][1x21 char] 'false'
>> curs.data(1:4,2)
'2003-03-31 00:00:00.0'
'2003-03-31 00:00:00.0'
'2003-04-30 00:00:00.0'
'2003-04-30 00:00:00.0'
>> mat(1:4,:)
1.0e+005 *
0.0000 7.3167 -0.0001 0.0000 0.0001 -0.0001 -0.0002 7.3164 0
0.0001 7.3167 -0.0000 0.0001 0.0001 -0.0000 -0.0002 7.3164 0
0.0000 7.3170 -0.0001 0.0000 0.0001 -0.0000 -0.0002 7.3164 0
0.0001 7.3170 -0.0001 -0.0000 0.0001 -0.0000 -0.0002 7.3164 0
>> s
Coupon: [13215x1 double]
Maturity: [13215x1 double]
Axx_Spd: [13215x1 double]
AX_COD: [13215x1 double]
AX_100dMax: [13215x1 double]
AX_100dAvg: [13215x1 double]
AX_100dMin: [13215x1 double]
AX_Date: [13215x1 double]
Current: [13215x1 double]

It's not fancy, but it works.

引用格式

Michael Robbins (2026). DatabaseCell2Mat (https://ww2.mathworks.cn/matlabcentral/fileexchange/3891-databasecell2mat), MATLAB Central File Exchange. 检索时间: .

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1.0.0.0