[R] How to sum and group data by DATE in data frame

R. Michael Weylandt michael.weylandt at gmail.com
Fri May 18 13:03:07 CEST 2012


Well, it's not quite the dput(head(X, 25)) I asked for, but it
works....thank you :-)

Do take a look at the examples for aggregate -- then the right syntax
is pretty clear

z <- aggregate(x, timeSequence(from = start(x),  to = end(x), by = "day"), sum)

but there seems to be some little issue that makes you miss the
endpoints of each day -- I think that's because your first and last
points aren't quite on the midnight boundary. This might work better

aggregate(x, timeSequence(from = as.Date(start(x)), to =
as.Date(end(x)), by = "day"), FUN = sum)

Personally, I find the timeSeries framework inordinately painful to
work with and I'd suggest you use zoo/xts objects instead

Best,
Michael

On Thu, May 17, 2012 at 2:48 AM, Cren <oscar.soppelsa at bancaakros.it> wrote:
> Thank you, Michael :)
>
> Michael Weylandt wrote
>>
>> If that doesn't nail it down, I'll need you to answer the questions I
>> asked in my previous email.
> Previously I made a mistake with *dput()*, this is the correct output:
>
>> dput(X)
> new("timeSeries"
>    , .Data = structure(c(124.3, 124.38, 124.67, 125.19, 124.9, 125.27,
> 125.5,
> 125.58, 125.91, 125.8, 125.83, 126.215, 126.25, 126.25, 124.901,
> 124.43, 124.4654, 124.46, 124.68, 124.86, 124.73, 125.22, 125.48,
> 125.5601, 125.4091, 125.15, 125.43, 125.481, 125.91, 125.29,
> 124.79, 124.77, 124.7, 124.37, 124.56, 124.86, 125.3, 125.59,
> 125.95, 125.73, 126.27, 126.26, 127.33, 126.37, 126.46, 126,
> 126.06, 126.2662, 126.23, 126.4499, 127.12, 127.48, 127.49, 127.69,
> 127.88, 127.88, 124.51, 124.42, 124.92, 125.18, 125.23, 124.81,
> 125.07, 124.61, 123.8869, 123.24, 123.3329, 123.6, 123.19, 123.161,
> 123.96, 123.58, 123.42, 123.68, 124.19, 123.985, 124.24, 124.61,
> 124.6566, 124.18, 123.795, 124.36, 124.32, 124.32, 126.1101,
> 126.42, 126.8181, 126.79, 126.675, 126.68, 126.685, 126.725,
> 126.65, 126.77, 126.55, 126.63, 126.67, 126.66, 125.8829, 126.05,
> 125.97, 125.99, 125.59, 125.21, 125.31, 125.46, 125.39, 125.23,
> 124.93, 125.32, 125.46, 125.46, 125.62, 125.34, 125.163, 125.01,
> 125.115, 125.67, 126.08, 126.15, 126.33, 126.19, 126.3955, 126.71,
> 126.083, 126.083, 125.23, 124.96, 125.595, 125.77, 125.4, 125.38,
> 125.54, 126.01, 126.05, 126.01, 125.72, 124.79, 124.05, 124.08,
> 123.35, 123.85, 123.75, 123.5, 123.58, 122.9285, 122.14, 122.02,
> 121.86, 121.58, 121.79, 121.68, 122.18, 122.105, 122.37, 122.02,
> 122.4765, 122.31, 121.99, 121.8401, 121.85, 122.17, 122.27, 122.26,
> 122.08, 122.02, 121.979, 121.979, 119.74, 119.55, 118.95, 119.12,
> 119.14, 118.91, 119.0201, 119.235, 118.93, 119.51, 119.51, 120.04,
> 119.63, 119.661, 119.77, 119.78, 118.89, 118.85, 118.9, 119.2671,
> 119.73, 119.8, 119.52, 119.43, 119.16, 119.28, 119.19, 119.19,
> 117.43, 117.18, 117.3, 116.87, 117.07, 117.0565, 117.4497, 117.47,
> 117.07, 116.856, 116.91, 117.075, 116.6, 116.56, 117.09, 117.361,
> 117.35, 117.2787, 116.72, 116.76, 116.34, 116.34, 116.34, 119.88,
> 119.98, 119.8095, 119.995, 119.88, 119.685, 119.48, 119.845,
> 119.505, 119.65, 119.36, 119.02, 119.73, 119.71, 120.44, 120.65,
> 120.45, 120.53, 120.41, 120.67, 120.399, 120.39, 119.91, 120.069,
> 120.18, 120.37, 120.05, 120.05, 123.9711, 124.01, 124.47, 124.14,
> 124.14, 124.12, 124.14, 123.94, 123.86, 124, 124.07, 124.33,
> 125.04, 124.99, 125.47, 125.39, 124.91, 124.5802, 124.88, 124.89,
> 124.48, 124.88, 125.335, 125.12, 125.07, 125.25, 124.96, 124.97,
> 126.02, 126.41, 126.19, 125.93, 125.5199, 125.575, 125.6702,
> 125.471, 125.506, 125.41, 125.14, 125.18, 124.86, 124.86, 126.63,
> 127.01, 126.881, 126.86, 126.81, 126.86, 127.05, 126.945, 126.2946,
> 126.1511, 126.28, 125.54, 126.24, 126.22, 125.99, 126.41, 126.12,
> 126.05, 126.17, 126.13, 126.14, 126.43, 126.26, 126.35, 126.89,
> 126.645, 126.26, 126.26, 125.5, 125.12, 125.49, 125.86, 125.96,
> 126.28, 126.37, 126.35, 126.115, 126.1, 125.83, 126.42, 126.73,
> 126.73, 125.79, 125.32, 125.4, 124.98, 125.0601, 125, 124.84,
> 124.5, 124.6246, 124.56, 124.29, 124.78, 123.98, 123.95, 125.13,
> 125.24, 125.48, 125.84, 125.73, 125.76, 125.87, 126.02, 125.9,
> 126.09, 126.19, 126.21, 126.05, 126.05, 124.208, 123.96, 124.04,
> 123.9, 123.4, 123.48, 123.5046, 123.55, 123.5911, 123.59, 123.71,
> 123.825, 124.19, 124.21, 125.38, 125.0199, 124.64, 124.64, 124.85,
> 124.675, 124.79, 124.67, 124.79, 124.53, 123.86, 123.1, 123.05,
> 123.05, 122.42, 122.25, 121.81, 121.77, 121.66, 121.94, 122.1484,
> 122.5, 122.0654, 122.07, 121.67, 121.96, 121.71, 121.74, 123.06,
> 122.57, 122.21, 122.55, 122.31, 122.71, 122.47, 122.4773, 122.405,
> 122.31, 122.18, 122.37, 122.18, 122.185, 122.44, 122.68, 122.69,
> 122.51, 121.9, 121.74, 121.6, 121.78, 121.5999, 121.46, 121.67,
> 121.57, 121.59, 121.59, 122.05, 121.892, 121.47, 121.28, 120.85,
> 121.09, 121.15, 121.02, 121.24, 121.02, 121.07, 120.21, 120.32,
> 120.29, 122.99, 123.3, 123.35, 123.47, 123.4254, 123.469, 123.54,
> 123.72, 123.7, 123.72, 123.9, 123.97, 123.92, 123.93, 123.26,
> 123.49, 123.31, 123.13, 123.2, 122.85, 123.34, 123.34, 123.59,
> 123.57, 123.73, 124.03, 124.17, 124.17, 124.98, 124.97, 124.78,
> 124.8, 124.88, 125.25, 125.22, 125.3, 125.201, 125.3289, 125.1,
> 125.345, 125.4, 125.27, 125.66, 125.68, 125.73, 125.946, 126.04,
> 126.11, 126.2, 126.08, 126.11, 126.02, 126.05, 126.005, 126.41,
> 126.39, 126.77, 126.78, 126.39, 126.57, 126.55, 126.635, 126.58,
> 126.55, 126.72, 126.62, 126.7, 126.65, 126.49, 126.49, 125.74,
> 125.4, 125.39, 125.1, 125.05, 125.08, 124.94, 125.14, 125.29,
> 125.13, 124.99, 124.78, 124.88, 124.83, 125.42, 125.6991, 125.83,
> 125.64, 125.9505, 125.8001, 125.83, 125.8077, 125.88, 125.89,
> 125.86, 126, 126.12, 126.12, 126.1685, 126.08, 126.11, 126.22,
> 126.03, 126, 126.04, 126, 126.04, 125.78, 125.839, 125.94, 125.5,
> 125.5, 127.95, 128.19, 128.24, 128.18, 127.955, 127.937, 127.52,
> 127.56, 127.73, 127.85, 128.04, 127.78, 127.49, 127.495, 127.36,
> 126.9246, 126.9991, 127.15, 127.3, 127.58, 127.61, 127.44, 127.68,
> 127.6, 127.71, 127.62, 127.63, 127.7, 126.68, 127.04, 126.83,
> 127.34, 127.37, 127.54, 127.89, 128.01, 128.07, 127.86, 127.86,
> 127.93, 128.04, 128.04, 127.43, 127.59, 127.7054, 127.93, 128.04,
> 128.02, 127.82, 127.74, 128.01, 127.99, 127.855, 127.83, 127.82,
> 127.71, 127.8, 128.1372, 127.72, 127.6, 127.711, 127.89, 127.87,
> 127.95, 127.99, 128.031, 127.97, 128, 127.99, 128.02, 129.34,
> 129.41, 129.4101, 129.4, 129.33, 128.989, 129.13, 129.069, 129.16,
> 129.185, 129.28, 129.18, 129.15, 129.13, 128.63, 128.86, 128.79,
> 128.7, 128.86, 128.9195, 128.96, 129.1072, 129.02, 128.95, 129.02,
> 129.35, 129.25, 129.2, 129.3, 128.86, 128.74, 128.94, 129.025,
> 129.16, 129.275, 129.29, 129.2859, 129.23, 129.49, 129.495, 129.51,
> 129.51, 128.48, 128.09, 128.29, 128.53, 128.52, 128.3, 128.4,
> 128.17, 128.44, 128.549, 128.62, 128.8, 129.03, 128.84, 130.05,
> 129.95, 129.86, 130.02, 130, 130.01, 129.85, 129.86, 129.86,
> 129.76, 129.38, 129.26, 129.31, 129.34, 129.8199, 130.11, 130.1,
> 130, 129.98, 130.37, 130.45, 130.395, 130.28, 130.63, 130.549,
> 130.73, 130.77, 130.77, 131.18, 131.1301, 131.2489, 131.46, 131.5274,
> 131.38, 131.36, 131.54, 131.37, 131.43, 131.22, 131.42, 131.46,
> 131.46, 131.26, 131.3, 131.12, 131.0617, 131.08, 131.148, 131.21,
> 131.36, 131.22, 131.12, 131.19, 131.305, 131.95, 131.54, 132.07,
> 132.015, 131.949, 131.7, 131.33, 131.19, 131.16, 131.35, 131.485,
> 131.46, 131.55, 131.6899, 131.58, 131.61, 130.79, 130.98, 131.2,
> 131.38, 131.22, 131.2101, 131.36, 131.17, 131.27, 131.37, 131.32,
> 131.47, 131.46, 131.46, 130.8301, 131.11, 131.2, 131.34, 131.2846,
> 131.369, 131.49, 132.12, 132.464, 131.99, 132.28, 132.52, 132.56,
> 132.56, 133.29, 132.68, 132.2699, 132.48, 132.32, 132.18, 132.36,
> 132.2766, 132.03, 131.815, 131.75, 131.41, 131.88, 131.88, 131.76,
> 131.66, 131.56, 131.64, 131.45, 131.38, 131.24, 131.455, 131.63,
> 131.52, 131.72, 132, 131.79, 131.82, 130.4, 130.21, 130.53, 130.72,
> 130.7179, 130.84, 130.79, 130.87, 131.13, 131.29, 131.24, 131.34,
> 131.37, 131.37, 131.58, 131.49, 131.009, 130.87, 130.88, 131,
> 131.011, 131.24, 130.97, 131.28, 131.29, 131.38, 131.21, 131.32,
> 132.28, 132.66, 132.74, 132.68, 132.691, 132.911, 132.8985, 132.999,
> 132.85, 132.91, 132.85, 132.67, 132.47, 132.47, 132.62, 132.71,
> 132.88, 132.76, 132.59, 132.47, 132.5031, 132.421, 132.6389,
> 132.64, 132.635, 132.66, 132.71, 132.68, 134.2, 134.21, 134.26,
> 134.38, 134.27, 134.4, 134.45, 134.42, 134.35, 134.465, 134.5,
> 134.42, 134.568, 134.54, 134.129, 134.08, 134.14, 134.2685, 134.31,
> 134.22, 134.37, 134.285, 134.18, 134.27, 134.28, 134.34, 134.46,
> 134.45, 133.931, 134.04, 134.56, 134.81, 134.66, 134.69, 134.78,
> 134.73, 134.83, 134.68, 134.6, 134.98, 134.79, 134.79, 135.13,
> 135.13, 134.91, 134.46, 134.56, 134.69, 134.82, 134.87, 134.78,
> 134.92, 135.07, 135.079, 135.19, 135.19, 135.29, 134.71, 135,
> 134.98, 135.27, 135.26, 135.41, 135.521, 135.4603, 135.52, 135.41,
> 135.42, 135.36, 135.36, 134.02, 134.11, 134.21, 134.18, 134.28,
> 134.23, 134.45, 134.23, 133.99, 134.16, 134.12, 134.13, 134.361,
> 134.361, 135.17, 134.98, 135.0385, 135.04, 135.14, 135.06, 135.17,
> 135.27, 135.32, 135.39, 135.43, 135.395, 135.35, 135.36, 134.93,
> 134.86, 134.71, 134.91, 134.92, 134.86, 134.69, 134.61, 134.75,
> 134.41, 134.51, 134.32, 135.22, 135.19, 135.53, 135.43, 135.4,
> 135.65, 135.77, 135.615, 134.9899, 135.06, 135.15, 134.96, 134.46,
> 134.4603, 134.54, 134.56, 134.67, 135.09, 134.92, 135.155, 135.59,
> 135.68, 135.74, 135.9, 135.96, 135.9786, 136.0172, 135.99, 136.04,
> 136.049, 136.4101, 136.28, 136.1761, 136.0854, 136.145, 136.1246,
> 136.15, 136.25, 136.29, 136.34, 136.36, 136.52, 136.41, 136.41,
> 136.43, 136.6, 136.94, 136.92, 136.82, 136.88, 136.82, 136.897,
> 136.69, 136.49, 136.18, 136.19, 136.48, 136.47, 136.27, 136.31,
> 136.3, 136.2, 135.95, 135.98, 136, 136.26, 136.29, 136.29, 136.05,
> 136.11, 136.011, 136.032, 135.67, 135.93, 136.36, 136.44, 136.3901,
> 136.46, 136.39, 136.31, 136.39, 136.4199, 136.41, 136.64, 136.631,
> 136.631, 136.95, 136.85, 136.82, 137.06, 137.15, 137.1399, 137.115,
> 137.04, 136.98, 136.815, 136.76, 136.79, 136.93, 136.93, 136.09,
> 136.43, 136.7, 137.125, 137.1, 137.07, 137.28, 137.16, 137.12,
> 137.18, 137.27, 137.25, 137.16, 137.16, 137.53, 137.29, 137.48,
> 137.57, 137.515, 137.461, 137.56, 137.49, 137.18, 137.11, 137.28,
> 137.51, 137.56, 137.559, 138.1, 137.75, 137.27, 136.85, 137.28,
> 137.495, 137.4, 137.33, 137.54, 137.51, 137.29, 137.09, 136.54,
> 137.02, 137.5, 137.59, 137.46, 137.56, 137.68, 137.755, 137.77,
> 137.95, 137.92, 137.775, 137.77, 137.56, 137.71, 137.73, 137.47,
> 137.75, 137.58, 137.54, 137.325, 137.25, 137.28, 137.11, 137.27,
> 137.28, 137.385, 137.47, 137.32, 137.312, 137.05, 136.5, 136.6,
> 136.529, 136.47, 136.49, 136.3716, 136.59, 136.45, 136.68, 136.82,
> 136.925, 136.75, 136.75, 135.07, 134.942, 134.86, 135.145, 134.83,
> 134.6179, 134.72, 134.61, 134.65, 134.505, 134.425, 134.58, 134.69,
> 134.75, 135.15, 135.08, 135.1572, 135.5854, 135.64, 135.62, 135.69,
> 135.63, 135.581, 135.72, 135.73, 135.7595, 135.712, 135.69, 136.51,
> 136.33, 136.575, 136.72, 136.79, 136.9099, 136.98, 136.915, 136.86,
> 136.8513, 137.195, 137.205, 137.012, 137.04, 137.2301, 137.71,
> 137.86, 137.7507, 137.85, 137.79, 137.78, 137.765, 137.87, 137.76,
> 137.46, 137.54, 137.57, 137.57, 137.52, 137.35, 137.3476, 137.28,
> 137.2, 137.36, 137.37, 137.43, 137.535, 137.58, 137.62, 137.615,
> 137.58, 137.58, 138.16, 138.26, 138.49, 138.62, 138.76, 138.79,
> 138.9, 138.91, 138.81, 138.76, 138.77, 139.6, 140.06, 140.062,
> 140.3, 140.31, 140, 139.88, 139.93, 139.85, 140.07, 140.28, 139.7,
> 139.7, 139.765, 139.8, 139.9, 139.91, 140.03, 140.23, 140.15,
> 140.26, 140.29, 140.63, 140.63, 140.51, 140.46, 140.57, 140.63,
> 140.68, 140.681, 140.72, 140.13, 140.14, 140.37, 140.25, 140.35,
> 140.36, 140.31, 140.32, 140.36, 140.37, 140.37, 140.275, 140.3,
> 140.3, 140.57, 140.44, 140.5798, 140.511, 140.84, 140.9, 141.04,
> 141.21, 141.2017, 141.21, 141.0691, 140.981, 140.87, 140.85,
> 139.95, 139.97, 140.125, 140.21, 140.09, 140.14, 140.21, 140.31,
> 140.4, 140.475, 140.47, 140.53, 140.41, 140.44, 140.36, 140.31,
> 140.02, 140.15, 140.205, 140.49, 140.51, 140.395, 140.36, 140.43,
> 140.46, 140.555, 140.17, 140.21, 139.34, 139.25, 138.95, 139.07,
> 139.12, 139.23, 139.38, 139.29, 139.235, 139.24, 139.075, 139,
> 139.16, 139.2, 139.06, 138.7899, 139.16, 139.4, 139.55, 139.4201,
> 139.59, 139.67, 139.53, 139.72, 139.69, 139.6575, 139.66, 139.65,
> 140.76, 141.01, 141.0281, 140.955, 140.92, 140.85, 140.84, 140.94,
> 141, 141.165, 141.26, 141.38, 141.55, 141.61, 141.79, 141.64,
> 141.48, 141.54, 141.63, 141.6, 141.634, 141.52, 141.6, 141.71,
> 141.63, 141.38, 141.159, 141.17, 141.02, 140.97, 140.71, 140.58,
> 140.005, 140.132, 140.035, 139.97, 139.99, 139.81, 140.16, 140.16,
> 140.48, 140.47, 139.51, 139.25, 139.44, 139.22, 139.23, 139.23,
> 139.53, 139.42, 139.39, 139.79, 139.75, 140.01, 140.21, 140.23,
> 140.59, 140.3975, 140.32, 140.78, 140.76, 140.76, 140.77, 140.865,
> 140.9, 140.87, 140.84, 140.83, 140.81, 140.81, 140.73, 141.1,
> 141.23, 141.55, 141.85, 141.95, 142.03, 142.01, 142.08, 142.01,
> 142.2, 142.03, 141.79, 141.84, 141.59, 141.64, 141.76, 141.43,
> 141.34, 141.22, 141.289, 141.21, 141.37, 140.75, 140.71, 140.781,
> 141.26, 141.26, 140.24, 139.79, 139.41, 139.55, 139.7, 139.77,
> 139.67, 139.4, 139.754, 139.63, 139.88, 139.98, 139.78, 139.86,
> 139.66, 139.8, 140.13, 140.02, 140, 139.92, 139.81, 139.81, 139.5887,
> 139.71, 139.79, 139.83, 139.8, 139.79, 137.96, 138.271, 138.27,
> 137.94, 138.13, 138.23, 138.43, 138.28, 138.62, 138.5601, 138.68,
> 138.48, 138.21, 138.22, 138.15, 137.8, 137.52, 137.41, 136.805,
> 136.5, 136.41, 136.18, 136.27, 136.195, 136.07, 135.965, 135.84,
> 135.9, 137.12, 137.4, 137.32, 137.125, 136.93, 137.14, 137.31,
> 137.17, 137.32, 137.18, 137.09, 136.89, 136.87, 137, 137.83,
> 137.785, 138.23, 138.32, 138.4, 138.46, 138.66, 138.615, 138.5,
> 138.66, 138.75, 138.67, 138.85, 138.79, 137.92, 137.69, 137.575,
> 137.56, 137.73, 137.63, 137.78, 137.77, 137.67, 137.66, 137.69,
> 137.64, 137.13, 137.14, 137.26, 136.899, 137.04, 137.04, 136.78,
> 136.87, 137.168, 137.04, 137.57, 137.34, 137.31, 137.215, 136.93,
> 137.05, 137.945, 138.345, 138.58, 138.78, 138.82, 139.05, 139.1,
> 139.15, 139.18, 139.27, 139.21, 139.34, 139.082, 139.082, 138.8699,
> 138.74, 138.945, 138.59, 138.78, 138.625, 138.6789, 138.62, 138.44,
> 138.82, 138.88, 138.725, 138.6, 138.61, 138.69, 138.38, 138.92,
> 138.64, 138.68, 138.1, 138.14, 138.01, 137.75, 137.49, 137.42,
> 137.64, 137.75, 137.72, 138.55, 138.53, 138.67, 138.59, 138.68,
> 138.71, 138.61, 138.43, 138.25, 138.35, 138.16, 138.01, 137.95,
> 137.95, 136.28, 136.17, 136.2199, 136.27, 136.43, 136.607, 136.44,
> 136.49, 136.48, 136.71, 136.56, 136.77, 136.79, 136.79, 136.94,
> 137.37, 137.51, 137.59, 137.41, 137.42, 137.14, 137.16, 137,
> 136.96, 137.21, 137.16, 137.31, 137.31, 139.05, 138.82, 138.73,
> 138.805, 138.68, 138.76, 138.91, 138.985, 138.89, 139.03, 139.115,
> 138.96, 139.19, 139.19, 139.1, 139.21, 139.15, 139.43, 139.38,
> 139.37, 139.415, 139.65, 139.95, 140.14, 140.17, 140.25, 140.16,
> 140.16, 140.21, 140.05, 140.24, 140.28, 140.33, 140.39, 140.39,
> 140.53, 140.65, 140.49, 140.55, 140.53, 140.39, 140.39, 139.72,
> 139.865, 139.72, 139.81, 139.8278, 139.78, 139.78, 139.76, 139.75,
> 139.62, 139.649, 139.68, 139.77, 139.87, 139.98, 141.11, 141.19,
> 141.31, 141.54, 141.49, 141.48, 141.37, 141.33, 141.28, 141.191,
> 141.04, 140.74, 140.74, 139.96, 139.56, 140.005, 139.97, 139.966,
> 140.26, 140.225, 140.03, 140.26, 140.46, 140.26, 140.19, 140.3,
> 140.325, 140.14, 139.86, 140.17, 140.18, 139.7499, 139.76, 139.67,
> 139.679, 139.19, 139.16, 139.145, 139.355, 139.27, 139.25, 138.06,
> 137.86, 137.83, 137.55, 137.16, 137.18, 137.2, 137.24, 137.344,
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> 1332523800, 1332525600, 1332527400, 1332529200, 1332768600, 1332770400,
> 1332772200, 1332774000, 1332775800, 1332777600, 1332779400, 1332781200,
> 1332783000, 1332784800, 1332786600, 1332788400, 1332790200, 1332792000,
> 1332855000, 1332856800, 1332858600, 1332860400, 1332862200, 1332864000,
> 1332865800, 1332867600, 1332869400, 1332871200, 1332873000, 1332874800,
> 1332876600, 1332878400, 1332941400, 1332943200, 1332945000, 1332946800,
> 1332948600, 1332950400, 1332952200, 1332954000, 1332955800, 1332957600,
> 1332959400, 1332961200, 1332963000, 1332964800, 1333027800, 1333029600,
> 1333031400, 1333033200, 1333035000, 1333036800, 1333038600, 1333040400,
> 1333042200, 1333044000, 1333045800, 1333047600, 1333049400, 1333051200,
> 1333114200, 1333116000, 1333117800, 1333119600, 1333121400, 1333123200,
> 1333125000, 1333126800, 1333128600, 1333130400, 1333132200, 1333134000,
> 1333135800, 1333137600, 1333373400, 1333375200, 1333377000, 1333378800,
> 1333380600, 1333382400, 1333384200, 1333386000, 1333387800, 1333389600,
> 1333391400, 1333393200, 1333395000, 1333396800, 1333459800, 1333461600,
> 1333463400, 1333465200, 1333467000, 1333468800, 1333470600, 1333472400,
> 1333474200, 1333476000, 1333477800, 1333479600, 1333481400, 1333483200,
> 1333546200, 1333548000, 1333549800, 1333551600, 1333553400, 1333555200,
> 1333557000, 1333558800, 1333560600, 1333562400, 1333564200, 1333566000,
> 1333567800, 1333569600, 1333632600, 1333634400, 1333636200, 1333638000,
> 1333639800, 1333641600, 1333643400, 1333645200, 1333647000, 1333648800,
> 1333650600, 1333652400, 1333654200, 1333656000, 1333978200, 1333980000,
> 1333981800, 1333983600, 1333985400, 1333987200, 1333989000, 1333990800,
> 1333992600, 1333994400, 1333996200, 1333998000, 1333999800, 1334001600,
> 1334064600, 1334066400, 1334068200, 1334070000, 1334071800, 1334073600,
> 1334075400, 1334077200, 1334079000, 1334080800, 1334082600, 1334084400,
> 1334086200, 1334088000, 1334151000, 1334152800, 1334154600, 1334156400,
> 1334158200, 1334160000, 1334161800, 1334163600, 1334165400, 1334167200,
> 1334169000, 1334170800, 1334172600, 1334174400, 1334237400, 1334239200,
> 1334241000, 1334242800, 1334244600, 1334246400, 1334248200, 1334250000,
> 1334251800, 1334253600, 1334255400, 1334257200, 1334259000, 1334260800,
> 1334323800, 1334325600, 1334327400, 1334329200, 1334331000, 1334332800,
> 1334334600, 1334336400, 1334338200, 1334340000, 1334341800, 1334343600,
> 1334345400, 1334347200, 1334583000, 1334584800, 1334586600, 1334588400,
> 1334590200, 1334592000, 1334593800, 1334595600, 1334597400, 1334599200,
> 1334601000, 1334602800, 1334604600, 1334606400, 1334669400, 1334671200,
> 1334673000, 1334674800, 1334676600, 1334678400, 1334680200, 1334682000,
> 1334683800, 1334685600, 1334687400, 1334689200, 1334691000, 1334692800,
> 1334755800, 1334757600, 1334759400, 1334761200, 1334763000, 1334764800,
> 1334766600, 1334768400, 1334770200, 1334772000, 1334773800, 1334775600,
> 1334777400, 1334779200, 1334842200, 1334844000, 1334845800, 1334847600,
> 1334849400, 1334851200, 1334853000, 1334854800, 1334856600, 1334858400,
> 1334860200, 1334862000, 1334863800, 1334865600, 1334928600, 1334930400,
> 1334932200, 1334934000, 1334935800, 1334937600, 1334939400, 1334941200,
> 1334943000, 1334944800, 1334946600, 1334948400, 1334950200, 1334952000,
> 1335187800, 1335189600, 1335191400, 1335193200, 1335195000, 1335196800,
> 1335198600, 1335200400, 1335202200, 1335204000, 1335205800, 1335207600,
> 1335209400, 1335211200, 1335274200, 1335276000, 1335277800, 1335279600,
> 1335281400, 1335283200, 1335285000, 1335286800, 1335288600, 1335290400,
> 1335292200, 1335294000, 1335295800, 1335297600, 1335360600, 1335362400,
> 1335364200, 1335366000, 1335367800, 1335369600, 1335371400, 1335373200,
> 1335375000, 1335376800, 1335378600, 1335380400, 1335382200, 1335384000,
> 1335447000, 1335448800, 1335450600, 1335452400, 1335454200, 1335456000,
> 1335457800, 1335459600, 1335461400, 1335463200, 1335465000, 1335466800,
> 1335468600, 1335470400, 1335533400, 1335535200, 1335537000, 1335538800,
> 1335540600, 1335542400, 1335544200, 1335546000, 1335547800, 1335549600,
> 1335551400, 1335553200, 1335555000, 1335556800, 1335792600, 1335794400,
> 1335796200, 1335798000, 1335799800, 1335801600, 1335803400, 1335805200,
> 1335807000, 1335808800, 1335810600, 1335812400, 1335814200, 1335816000,
> 1335879000, 1335880800, 1335882600, 1335884400, 1335886200, 1335888000,
> 1335889800, 1335891600, 1335893400, 1335895200, 1335897000, 1335898800,
> 1335900600, 1335902400, 1335965400, 1335967200, 1335969000, 1335970800,
> 1335972600, 1335974400, 1335976200, 1335978000, 1335979800, 1335981600,
> 1335983400, 1335985200, 1335987000, 1335988800, 1336051800, 1336053600,
> 1336055400, 1336057200, 1336059000, 1336060800, 1336062600, 1336064400,
> 1336066200, 1336068000, 1336069800, 1336071600, 1336073400, 1336075200,
> 1336138200, 1336140000, 1336141800, 1336143600, 1336145400, 1336147200,
> 1336149000, 1336150800, 1336152600, 1336154400, 1336156200, 1336158000,
> 1336159800, 1336161600, 1336397400, 1336399200, 1336401000, 1336402800,
> 1336404600, 1336406400, 1336408200, 1336410000, 1336411800, 1336413600,
> 1336415400, 1336417200, 1336419000, 1336420800, 1336483800, 1336485600,
> 1336487400, 1336489200, 1336491000, 1336492800, 1336494600, 1336496400,
> 1336498200, 1336500000, 1336501800, 1336503600, 1336505400, 1336507200,
> 1336570200, 1336572000, 1336573800, 1336575600, 1336577400, 1336579200,
> 1336581000, 1336582800, 1336584600, 1336586400, 1336588200, 1336590000,
> 1336591800, 1336593600, 1336656600, 1336658400, 1336660200, 1336662000,
> 1336663800, 1336665600, 1336667400, 1336669200, 1336671000, 1336672800,
> 1336674600, 1336676400, 1336678200, 1336680000, 1336743000, 1336744800,
> 1336746600, 1336748400, 1336750200, 1336752000, 1336753800, 1336755600,
> 1336757400, 1336759200, 1336761000, 1336762800, 1336764600, 1336766400,
> 1337002200, 1337004000, 1337005800, 1337007600, 1337009400, 1337011200,
> 1337013000, 1337014800, 1337016600, 1337018400, 1337020200, 1337022000,
> 1337023800, 1337025600, 1337088600, 1337090400, 1337092200, 1337094000,
> 1337095800, 1337097600, 1337099400, 1337101200, 1337103000, 1337104800,
> 1337106600, 1337108400, 1337110200, 1337112000, 1337175000, 1337176800,
> 1337178600, 1337180400, 1337182200, 1337184000, 1337185800, 1337187600,
> 1337189400, 1337191200, 1337193000, 1337194800, 1337196600, 1337198400
> )
>    , format = "%Y-%m-%d %H:%M:%S"
>    , FinCenter = "GMT"
>    , recordIDs = structure(list(), .Names = character(0), row.names =
> integer(0), class = "data.frame")
>    , title = "Time Series Object"
>    , documentation = "Thu May 17 08:44:10 2012"
> )
>
> Those ten-digits numbers are read by R from Excel spreadsheet and their
> original source they're dates in format "%m-%d-%y %hour:%min"
>
> --
> View this message in context: http://r.789695.n4.nabble.com/How-to-sum-and-group-data-by-DATE-in-data-frame-tp903708p4630340.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.



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