KDAriane

h1. Eval111

h2. Synopsis

This operator has one parameter, one input and one output. The corresponding shell script executes the parameter as a command on the input, and copies the result in the output.

h2. Parameters

1 parameter, treated as the command to be executed.

h2. Inputs

1 input, the input file

h2. Outputs

1 output: the result of the command

h2. Shell code

<pre>

cmd=$1; shift

input=$1; shift

output=$1; shift

$cmd $input > $output

</pre>

h2. Example

This operator is mainly used, for filtering a file with the parameter as command, or computing a result from the input and writing it to the output. See [[CMAR.aws]] for an example where this operator computes the predicted class for the column file of the votes.