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https://issues.apache.org/jira/browse/SYSTEMML-526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15848898#comment-15848898
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Mike Dusenberry commented on SYSTEMML-526:
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+1
> Allow read iofilename to be non-constant value
> ----------------------------------------------
>
> Key: SYSTEMML-526
> URL: https://issues.apache.org/jira/browse/SYSTEMML-526
> Project: SystemML
> Issue Type: Improvement
> Components: APIs
> Reporter: Deron Eriksson
>
> Currently, the write statement supports variable iofilenames but the read
> statement does not. For flexibility (such as looping over multiple data
> files), it would be nice to be able to use iofilenames containing variable
> values that can change.
> The following code works. It shows how we can write to 3 separate files, but
> here we're reading from only 1 file.
> {code}
> for (i in 1:3) {
> m = read("mydata-1.csv");
> n = m + 1;
> write(n, "myresult-" + i + ".csv", format="csv");
> }
> {code}
> If I try to read from 3 separate data files utilizing the i variable, I get
> an error:
> {code}
> for (i in 1:3) {
> m = read("mydata-" + i + ".csv");
> n = m + 1;
> write(n, "myresult-" + i + ".csv", format="csv");
> }
> {code}
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