Finding first three natural frequencies and ploting modeshapes of a fixed-fixed beam with a lumped mass at the middle

I am facing problem in Finding first three natural frequencies and ploting modeshapes of a fixed-fixed mass less beam with a lumped mass at the middle. its an urgent requirement for my project. can someone help me with matlab code for the same? Values for area, length, mass at the middle and every other required numerical data will need to be entered by user at the starting of code.

PS: I'm new to matlab so not very fluent in working with it.

[Youssef Khmou]

frequency analysis is done using generally fft, can you give details about the numerical variables ?

[Vaibhav Manchanda]

Its generalized. i'll have to take data inputs from the user for the same, including length, area, lumped mass at mid (and all others).

[Youssef Khmou]

for one dimensional data, use abs(fft(data,N))), for multidimensional data use abs(fftn(data,N)).

[Vaibhav Manchanda]

I'll try. thanks

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency