The question is not very clear.

Your options are transmission versus frequency (usually wavenumber), or Absorbance versus frequency, and then the frequency range, usually the full spectrum ~600-4000 cm-1, or just the fingerprint region ~600-2000cm-1

sir i have value for polythene film, can u mention the compound name

and another one is if the peak value decresses means what i conclude whethere it degrade or not

Hi everyone 

 I used sheep and cow dung for soil burail experiment, after the 1 year incubation period i saw that it was white powder in nature(some get compost) so please somebody help me to identify it why it was white in colour , then how i identify it .,is there any methodology means pls refer it

Thank You