04/16/2014: Example of Replacing The Middle of a Time Series in R
Exploration of replacing part of a Time Series
install.packages('zoo')
library('zoo')
timeSeries <- ts(1:96, freq=12, start=2001); timeSeries
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001 1 2 3 4 5 6 7 8 9 10 11 12
2002 13 14 15 16 17 18 19 20 21 22 23 24
2003 25 26 27 28 29 30 31 32 33 34 35 36
2004 37 38 39 40 41 42 43 44 45 46 47 48
2005 49 50 51 52 53 54 55 56 57 58 59 60
2006 61 62 63 64 65 66 67 68 69 70 71 72
2007 73 74 75 76 77 78 79 80 81 82 83 84
2008 85 86 87 88 89 90 91 92 93 94 95 96
#
# If you already know the indexes of the elements to
# replace, just do it:
#
timeSeries[13:36] <- NA
timeSeries
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001 1 2 3 4 5 6 7 8 9 10 11 12
2002 NA NA NA NA NA NA NA NA NA NA NA NA
2003 NA NA NA NA NA NA NA NA NA NA NA NA
2004 37 38 39 40 41 42 43 44 45 46 47 48
2005 49 50 51 52 53 54 55 56 57 58 59 60
2006 61 62 63 64 65 66 67 68 69 70 71 72
2007 73 74 75 76 77 78 79 80 81 82 83 84
2008 85 86 87 88 89 90 91 92 93 94 95 96
#
# However, sometimes you might want to refer to the
# Time Series part by date. Below is one way to do
# that.
#
#
# Reset the Time Series and then look at just two years, 2002 and 2003
#
timeSeries <- ts(1:96, freq=12, start=2001);
window(timeSeries, start=c(2002,1), end=c(2003,12))
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2002 13 14 15 16 17 18 19 20 21 22 23 24
2003 25 26 27 28 29 30 31 32 33 34 35 36
#
# Copy this part of the timeSeries for safety.
#
original = window(timeSeries, start=c(2002,1), end=c(2003,12))
#
# Change 2002 and 2003 to NA because a lawsuit is pending.
#
window(timeSeries, start=c(2002,1), end=c(2003,12)) <- NA
timeSeries
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001 1 2 3 4 5 6 7 8 9 10 11 12
2002 NA NA NA NA NA NA NA NA NA NA NA NA
2003 NA NA NA NA NA NA NA NA NA NA NA NA
2004 37 38 39 40 41 42 43 44 45 46 47 48
2005 49 50 51 52 53 54 55 56 57 58 59 60
2006 61 62 63 64 65 66 67 68 69 70 71 72
2007 73 74 75 76 77 78 79 80 81 82 83 84
2008 85 86 87 88 89 90 91 92 93 94 95 96
#
# The lawsuit is over and you won. Retrieve the data.
#
window(timeSeries, start=c(2002,1), end=c(2003,12)) <- original
> timeSeries
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001 1 2 3 4 5 6 7 8 9 10 11 12
2002 13 14 15 16 17 18 19 20 21 22 23 24
2003 25 26 27 28 29 30 31 32 33 34 35 36
2004 37 38 39 40 41 42 43 44 45 46 47 48
2005 49 50 51 52 53 54 55 56 57 58 59 60
2006 61 62 63 64 65 66 67 68 69 70 71 72
2007 73 74 75 76 77 78 79 80 81 82 83 84
2008 85 86 87 88 89 90 91 92 93 94 95 96
04/04/2014: Resolving Bad Request In Spring MVC Controller
I hardly believe it's 2014 and I've run into an issue that a web search didn't quickly solve.
@RequestMapping(value = "/district/{name}", method = RequestMethod.GET)
public String communityHandler(Model model, @PathVariable String districtName) ... {
@RequestMapping(value = "/district/{name}", method = RequestMethod.GET)
public String communityHandler(Model model, @PathVariable String districtName) ... {
Notice the mismatch between {name} and the PathVariable? Yeah, it took me too long to spot the difference.