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Throw an error when more than one result is returned

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I have this running at the beginning of my script where it will look for two files in the directory the script is run in. I'm trying to add a check to throw an error if the 'ls' command returns more than one result. For example if there is 01-data.csv and 02-data.csv in the same directory, it will report an error that more than one result was found.
[status, data1] = system('ls *data.csv');
[status, info1] = system('ls *info.csv');
data1 = readtable(deblank(data1));
info1 = readtable(deblank(info1));
I am not too familiar with MATLAB so any help would be greatly appreciated. Thank you!

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Accepted Answer

Fangjun Jiang
Fangjun Jiang on 1 Jun 2020
use
files=dir('*data.csv');
size(files)

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ArtLabbe12
ArtLabbe12 on 1 Jun 2020
Thank you, this has given me some ideas of how to continue.

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