Flowcharts – Dynamic Variables

A dynamic variable is any word that begins and ends with a dollar sign ($). You use it in an argument in place of an actual file name. For example, where you would put the file name of an input image, you might put $input$ instead. If you check the box next to an empty argument, the argument's name is filled in, surrounded by $ signs: for example, $filename$ for “filename”.

The word “input” is just a word of your choice, to remind you which argument it stands for. For example, when taking the ratio of two images, you might use $numerator$ and $denominator$, or even $num$ and $denom$: anything that reminds you what the variable represents.

After you attach the job to the “exec” module, left-click exec to set its arguments. Its argument window has one labeled text box for each dynamic variable in the attached job. What to enter there is explained in Arguments for "exec".

Dynamic variables also work without a flowchart; see Dynamic Variables at the Basic level.