Hi,

Are there anyone who can help me about a matlab program that reads a text input file representing the circuit and determines the node voltage?
I need some ideas that how i can figure out this algorithm?

 

That is a whole lot to chew on. What have you done so far? What is the exact part you have problem with?

 

Is the file written SPICE syntax ? Here you have a guide to interpret it if needed.
Then you should use MATLLAB function as fopen, fgets (and so on) to read the data from the file.

 

Bymaster has this simple SPICE reader

https://uk.mathworks.com/matlabcentral/fileexchange/8237-import-spice-raw-file?s_tid=srchtitle

Hopcroft has this other SPICE reader:

https://uk.mathworks.com/matlabcentral/fileexchange/17838-spice3_import?s_tid=srchtitle

Be aware that SPICE has variants, for instance

https://uk.mathworks.com/matlabcentral/fileexchange/23095-read-ngspice?s_tid=srchtitle

would you please supply a text file with a circuit descriptor so that readers of your question can figure out
what way to go?

Appreciating time and attention, awaiting answer

John BG

MOD EDIT: Removed e-mail address.

 

You'll probably be waiting a long time -- the TS either got there issue resolved nearly a year ago or they have moved on.

 

I agree, but there may be other readers that may find it useful for these left-behind questions to have some kind of helpful answer instead of no answer at all, regards

John BG