semilog graph help

Thread Starter


Joined Jul 16, 2005
Just wanna know if anyone knows theres any semi-log(Bode) graph simulator/program site available to do some auto plotting. i am plotting log(decibel)Y-axis along frequency X-axis. maybe one that i can enter my values of dB and freq and it will auto-plot for me. if anyone knows any please post the link for me. i tried google but still a hard find because i dont know what to search specifically and some simulator are not what i want.

if there is not one then i guess i will have to do a manual way on a graph paper but the curve would not be nice. thanks


Joined Jan 28, 2005
If you have Microsoft EXCEL, you can create semi-log plots.

You would need to write the data generating equations and then use the graphing capability of EXCEL and select logarithm for the appropriate axis.



Joined Feb 24, 2006
The `R' language from the cran project is a free download and has an excellent plotting package which will save plots in pdf format.