# MATLAB symbolic to numeric

by sinusance
Tags: fft, matlab, numeric, symbolic, transfer function
 Share this thread:
 P: 4 hey, I'm trying to use matlab to simulate a simple RC low pass filter. I have an array of data that represents the signal I want to filter, and I have the s-domain representation of the filter circuit. I'm pretty new to this type of analysis, but I'm pretty sure I should be taking the fft of my data and multiplying it by the s-domain representation (transfer function) of the circuit, and then take the ifft to get the output. I guess my problem is I have a symbolic transfer function that I'm trying to multiply with a numeric array. Any Ideas on how I can get a numeric representation of my symbolic transfer function? Thanks in advance. (this is my transfer function if that helps) transferFunc = 100/(s+100)
 Sci Advisor P: 1,724 You probably want something called a Bode plot (magnitude and phase angle of a Linear Time Invariant system): http://en.wikipedia.org/wiki/Bode_plot If you have the MATLAB Controls Toolbox, you can generate a Bode plot of a system given its transfer function: http://www.mathworks.com/access/help.../ref/bode.html An example: http://www.engin.umich.edu/group/ctm/freq/freq.html
 P: 4 Thanks a million MATLABdude, That tutorial held all the answers and more! :)

 Related Discussions Differential Equations 0 Programming & Computer Science 0 Computers 0 Math & Science Software 3 Fun, Photos & Games 2