let us consider following data from finance.yahoo.com
http://finance.yahoo.com/q/hp?a=&b=&c=&d=8&e=16&f=2014&g=d&s=MTLA.HM%2C+&ql=1
for MOTOROLA SOLTN (MTLA.HM), i want to analyse for example its spectra; structure ,identify if it contains some periodic components, identify significant frequencies and so on, but for correct analysis it is important to know its sampling frequencies , can i identify it with this parameters
Daily
Weekly
Monthly
? thanks in advance
Can't comment (insufficient reputation) - so please accept this as a form of answer.
You don't say precisely what the purpose of the analysis is. I am guessing, but it seems like you may be wanting to analyse stock movements to find patterns? I think you want to be more specific in the question - at the moment it is very broad.
If I think about the question from a trading perspective. People trade shares on the basis of a variety of sampling frequencies. If your strategy is medium term (i.e. weeks to months) holding of shares then you are likely to be looking at daily or weekly movements. Others may trade between days or even within the day (i.e. having a zero position overnight) - for those even daily data is too infrequent and they may be looking at data ever minute/few minutes. These type of traders are generally trading off the data and market sentiment rather than company fundamentals.
I would presume there is a segment of traders who are looking at monthly data - those that are trading fundamentals of the company the share represents.
The other issue you have with lower frequency data is that the longer the time period a certain number of points represents - and therefore the data probably becomes more influenced by the general financial environment.
My view would be more frequent data (daily or better) and then take a peek at weekly and monthly.