Monitor

Monitor[expr,mon]

generates a temporary monitor cell in which the continually updated current value of mon is displayed during the course of evaluation of expr.

Details

  • Monitor[Table[e,{x,…}],x] generates a monitor cell that shows the continually updated current value of x during the evaluation of the Table.
  • In a notebook, the monitor cell normally appears directly after the cell in which Monitor[expr,mon] is evaluated. The cell is deleted as soon as the evaluation of expr is complete.
  • If Print, PrintTemporary, or similar output is generated before the evaluation of Monitor begins, it will appear before the monitor cell.
  • Any expression, including graphics and controls, can be given for mon.
  • Monitor[expr,mon,delay] will delay the indicated number of seconds before generating the monitor cell. If the evaluation of expr is complete before then, no monitor is displayed.

Examples

open allclose all

Basic Examples  (3)

Monitor the value of n while the computation is running:

Display a progress indicator while the computation is running:

Monitor a fast process by using Pause to slow down:

Applications  (5)

Monitor NIntegrate, with steps along the axis and evaluation points on the axis:

Monitor NDSolve using an extrapolation method:

Monitor NDSolve solving the sine-Gordon PDE:

Steps in parameter space for a nonlinear fit:

Monitor the evolution of the model over the steps with a graph:

Implement a simple LU decomposition with a slowdown parameter :

Monitor an algorithm animation using MatrixForm or MatrixPlot:

Possible Issues  (2)

Monitor can increase the time of a calculation:

Use Refresh to control the update interval used for displaying:

If the computation being monitored completes during the initial delay, no monitor will be displayed:

Wolfram Research (2007), Monitor, Wolfram Language function, https://reference.wolfram.com/language/ref/Monitor.html.

Text

Wolfram Research (2007), Monitor, Wolfram Language function, https://reference.wolfram.com/language/ref/Monitor.html.

CMS

Wolfram Language. 2007. "Monitor." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Monitor.html.

APA

Wolfram Language. (2007). Monitor. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Monitor.html

BibTeX

@misc{reference.wolfram_2021_monitor, author="Wolfram Research", title="{Monitor}", year="2007", howpublished="\url{https://reference.wolfram.com/language/ref/Monitor.html}", note=[Accessed: 26-January-2022 ]}

BibLaTeX

@online{reference.wolfram_2021_monitor, organization={Wolfram Research}, title={Monitor}, year={2007}, url={https://reference.wolfram.com/language/ref/Monitor.html}, note=[Accessed: 26-January-2022 ]}