Most [[Monitor]] objects are monitoring a continuous quantity in time. Such time series are generally written to file in a columnar format, where the first column describes the point in time of recording and the following column catch the value to be monitored. Some monitors such as [[PatternMonitor]] monitor can create multiple columns corresponding to multiple time series.

The typical output of a [[VoltageMonitor]] looks the following as a file
<code>
0.001700 -0.067260
0.001800 -0.067075
0.001900 -0.066905
0.002000 -0.066750
0.002100 -0.066608
0.002200 -0.066479
0.002300 -0.066361
0.002400 -0.066255
</code>

You can look at files of this type directly using your favourite plotter. I like [[gnuplot]] which transforms the above time series in a plot like the following
{{ :examples:coba_mem.png?300 |}}