How to concatenate an array of numbers without for loop
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Hi, I have an array of integer numbers A = [1, 2, 3]. I would like to concatenate the numbers for use in SQL statement like '(1, 2, 3)'. How to do that without a for loop? Thanks.
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Stephen23
il 22 Mar 2018
>> A = [1,2,3];
>> str = sprintf(', %d',A);
>> str = sprintf('(%s)',str(3:end))
str = (1, 2, 3)
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Guillaume
il 22 Mar 2018
A = [1 2 3];
sprintf('(%s)', strjoin(compose('%d', A), ', '))
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Guillaume
il 22 Mar 2018
compose was introduced in version R2016b. (You should say in your question if you're several versions behind).
In earlier versions, you can replace compose by the undocumented sprintfc:
sprintf('(%s)', strjoin(sprintfc('%d', A), ', '));
Or use Stephen's method of using sprintf then removing the initial ', '.
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