[R] ggplot and spec.pgram

Any Ideas to get an interactive periodogram? -- Let's not spend our time and resources thinking about things that are so little or so large that all they really do for us is puff us up and make us feel like gods. We are mammals, and have not exhausted the annoying little problems of being

[R] Identifying x, y coordinates from periodogram generated by spec.pgram

I would like to identify the x,y coordinates in a plot of the periodogram spec.pgram(a, taper=0, log=no) I have tried the identify() function to no avail I have also tried to pass the periodogram over to rggobi e-plot.spec(spec.pgram(a, taper=0, log=no)) ggobi(e) to no avail I need to

[R] time series

I am trying to work with a time series of one observation every fifteen minutes for a length of two years. My question really lies in how to code the timeseries to represent every observation is a fifteen minute interval. Below is the code that I used any help would be appreciated.

[R] Power Spectral Sensity

I am working with a dissolved oxygen dataset. continuous readings are taken at 15 minute intervals and we have been recording these data at 12 stations along the savannah river for two years now. The longest set of readings that are continuous without interuption is 53 days. I would like to

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