Parameter view or listing

Parameter values (.param <value>)might be derived from others, and it might be necessary to verify their numeric value. The workaround till now have been to add voltage sources with the parameters as values and measure the connected node value after simulation.

Adding a view listing all the parameters numeric values would be very much appreciated.

I notice that the header of the .qraw files lists all the parameters, but not the numeric value of derived parameters. I guess it is a good reason for that, but if not, maybe writing the numeric values here instead of the symbolic expression would be the quickest way to implement a parameter view.

In waveform viewer, right click > Add Plot, and you can force to display parameters value by typing their name in Expression. At this moment, data defines in .func or .param are not displayed in Add Plot list, but actually you can type and display that. Or you can use a .plot comment (waveform viewer must be closed for .plot in effect).

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This is an example to show you can plot name defined by .param and .func


Ah, thanks a lot. Using parameters in plot definitions solves the problem! This was a limitation in LTspice

Just realized a more simple method.
By including “.options LISTPARAM” can print a list of the evaluated parameters in Output Window.


That is absolutely perfect! Just what I was looking for. Thank you

Wow! Thanks for the comment about the waveform viewer needing to be closed before the .plot command would take effect. Is there a reason for this non-obvious choice? I just wasted a half hour looking at demos and examples before catching your comment. I would prefer that if I add a .plot to my schematic, it would just add it to the other items that are being displayed on the waveform viewer. I got tired of entering a complex plot waveform and expected that the .plot would do the job for me. I guess I should remember that SPICE programs are “expert friendly”.


Here is my observation in using waveform viewer with .plot and its plot config file

Thanks for the matrix.
(the ** note has the wrong extension - PDF instead of PFG)

thanks! I updated the guideline in Github for this typo.
I made multiple mistake and deleted two posts, but eventually still miss this file extension.