How can I create a dataset with a specific curve and add noise to it?

[clemon!!]

see the follwing print out - you can imagine what the trend might be - the dataset i want to make??

how can i create that data. i mean that sort of curve twice - the second time of a lower volume with noise added. make sense?http://imageshack.us/f/703/40382180.png
sorry for some reason i can't embed.thanks! precision is unimportant atm. if i knew how to joing peaks i could do it easy...

 

[Integral]

Looks a lot like a 1/x relationship.

 

[clemon!!]

yup. i started a new thread now in analysis section if you want to help :)Luke

 

[clemon!!]

oh i can create data approaching the trend... i don't know how to do so efficiently yet tho ha.

 

[clemon!!]

i was trying to run ifft on excel but i then want to manipulate the output [basically - everything above the median amp = 1, everything below = -1. turning into steps]... but this destroys the fft - completely. is there no way around that - i was thinking of using solver and ifft in excel together but that's impossible. so can i do so without programming, and anyway, is this just a completel dead end?