Print residuals

alupoi · Post by **alupoi** » Thu Nov 18, 2004 8:21 am

I would like to print the residual at each iteration on an external file, so to be able to check the convergence rate.
Does anyone know how to do it?
Thanks a lot,
Alessio Lupoi

berktaftali · Post by **berktaftali** » Thu Nov 18, 2004 10:14 am

Convergence tests have a flag to let the user specify what to output to screen:

test NormUnbalance $tol $maxNumIter <$printFlag>

$printFlag :
0 - no print output (default)
1 - print information on each step
2 - print information when convergence has been achieved
4 - print norm, dU and dR vectors
5 - at convergence failure, carry on, print error message, but do not stop analysis

Let the program print what you want to screen, then capture it by redirecting to a file:

In command prompt, type

opensees "yourfile.tcl" > out.txt 2>&1

to save all program screen output in out.txt

Hope this helps...

Post by **fmk** » Tue Nov 30, 2004 12:29 pm

you can also use the logFile <fileName> command in the script .. this does pretty much the same thing .. the o/p appears on the screen and is also sent to a file .. only output after logFile command appears.