search for: sinudoidal

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2008 Oct 27
2
Stuck with FFT
...what the command line is but I can't get it to refer to the array. What is 'z'? If I have a table open entitled '24hsinusoids' with date/ time column by the hour from January 01 2008 00:00 to January 02 2011 00:00 (X01.06.2008) (time column listed as X00:00) with corresponding sinudoidal signal value column (X100) to give a complete curve for 24hours spread as curves over the whole time-span, how can I fft from this table? fft(z, inverse = FALSE) gives me as; object 'z' not found. Please help and explain how R recognises the table and does fft's from it. The time-seri...