might be a simple question but I am having trouble trying to get the mean and standard deviation over a whole period 2007-2019 from a xts object and not just the yearly info. Is there a way to do this all at once?
apply.yearly(zxl$logs, mean)
apply.yearly(zxl$logs, sd)
Data
open high low close volume adjusted logs
2007-01-02 7.76 7.80 7.72 7.79 469679 4.320257 NA
2007-01-03 7.80 7.80 7.71 7.72 603550 4.281435 -0.009026496
2007-01-04 7.71 7.86 7.71 7.82 2184809 4.336895 0.012870191
2007-01-05 7.82 8.04 7.79 7.90 2689292 4.381261 0.010178205
2007-01-08 7.97 7.97 7.67 7.69 1284530 4.264797 -0.026941976
2007-01-09 7.72 7.81 7.71 7.72 1904052 4.281435 0.003893581
2007-01-10 7.65 7.80 7.64 7.67 931877 4.253706 -0.006497749
2007-01-11 7.65 7.67 7.56 7.60 955782 4.214884 -0.009168368
2007-01-12 7.63 7.81 7.61 7.75 1002917 4.298072 0.019544596
Not sure if I understand completely, but did you try mean(zxl$logs), sd(zxl$logs)? That should do it over the entire dataset.
If you want to restrict to a period, you could just do
mean(zxl['2007-01/2019-01']$logs)